JS script to send connection requests to your LinkedIn search results with customisation options, accept all received connection requests, and withdraw pending sent connection requests.

AutoConnectLinkedIn.js

// If the script does not work, you may need to allow same site scripting https://stackoverflow.com/a/50902950

Linkedin = {
  config: {
    scrollDelay: 3000,
    actionDelay: 5000,
    nextPageDelay: 5000,
    // set to -1 for no limit
    maxRequests: -1,
    totalRequestsSent: 0,
    // set to false to skip adding note in invites
    addNote: true,
    note: "Hey {{name}}, I'm looking forward to connecting with you!",
  },
  init: function (data, config) {
    console.info("INFO: script initialized on the page...");
    console.debug(
      "DEBUG: scrolling to bottom in " + config.scrollDelay + " ms"
    );
    setTimeout(() => this.scrollBottom(data, config), config.actionDelay);
  },
  scrollBottom: function (data, config) {
    window.scrollTo({ top: document.body.scrollHeight, behavior: "smooth" });
    console.debug("DEBUG: scrolling to top in " + config.scrollDelay + " ms");
    setTimeout(() => this.scrollTop(data, config), config.scrollDelay);
  },
  scrollTop: function (data, config) {
    window.scrollTo({ top: 0, behavior: "smooth" });
    console.debug(
      "DEBUG: inspecting elements in " + config.scrollDelay + " ms"
    );
    setTimeout(() => this.inspect(data, config), config.scrollDelay);
  },
  inspect: function (data, config) {
    var totalRows = this.totalRows();
    console.debug("DEBUG: total search results found on page are " + totalRows);
    if (totalRows >= 0) {
      this.compile(data, config);
    } else {
      console.warn("WARN: end of search results!");
      this.complete(config);
    }
  },
  compile: function (data, config) {
    var elements = document.querySelectorAll("button");
    data.pageButtons = [...elements].filter(function (element) {
      return element.textContent.trim() === "Connect";
    });
    if (!data.pageButtons || data.pageButtons.length === 0) {
      console.warn("ERROR: no connect buttons found on page!");
      console.info("INFO: moving to next page...");
      setTimeout(() => {
        this.nextPage(config);
      }, config.nextPageDelay);
    } else {
      data.pageButtonTotal = data.pageButtons.length;
      console.info("INFO: " + data.pageButtonTotal + " connect buttons found");
      data.pageButtonIndex = 0;
      var names = document.getElementsByClassName("entity-result__title-text");
      names = [...names].filter(function (element) {
        return element.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.textContent.includes(
          "Connect\n"
        );
      });
      data.connectNames = [...names].map(function (element) {
        return element.innerText.split(" ")[0];
      });
      console.debug(
        "DEBUG: starting to send invites in " + config.actionDelay + " ms"
      );
      setTimeout(() => {
        this.sendInvites(data, config);
      }, config.actionDelay);
    }
  },
  sendInvites: function (data, config) {
    console.debug("remaining requests " + config.maxRequests);
    if (config.maxRequests == 0) {
      console.info("INFO: max requests reached for the script run!");
      this.complete(config);
    } else {
      console.debug(
        "DEBUG: sending invite to " +
          (data.pageButtonIndex + 1) +
          " out of " +
          data.pageButtonTotal
      );
      var button = data.pageButtons[data.pageButtonIndex];
      button.click();
      if (config.addNote && config.note) {
        console.debug(
          "DEBUG: clicking Add a note in popup, if present, in " +
            config.actionDelay +
            " ms"
        );
        setTimeout(() => this.clickAddNote(data, config), config.actionDelay);
      } else {
        console.debug(
          "DEBUG: clicking done in popup, if present, in " +
            config.actionDelay +
            " ms"
        );
        setTimeout(() => this.clickDone(data, config), config.actionDelay);
      }
    }
  },
  clickAddNote: function (data, config) {
    var buttons = document.querySelectorAll("button");
    var addNoteButton = Array.prototype.filter.call(buttons, function (el) {
      return el.textContent.trim() === "Add a note";
    });
    // adding note if required
    if (addNoteButton && addNoteButton[0]) {
      console.debug("DEBUG: clicking add a note button to paste note");
      addNoteButton[0].click();
      console.debug("DEBUG: pasting note in " + config.actionDelay);
      setTimeout(() => this.pasteNote(data, config), config.actionDelay);
    } else {
      console.debug(
        "DEBUG: add note button not found, clicking send on the popup in " +
          config.actionDelay
      );
      setTimeout(() => this.clickDone(data, config), config.actionDelay);
    }
  },
  pasteNote: function (data, config) {
    noteTextBox = document.getElementById("custom-message");
    noteTextBox.value = config.note.replace(
      "{{name}}",
      data.connectNames[data.pageButtonIndex]
    );
    noteTextBox.dispatchEvent(
      new Event("input", {
        bubbles: true,
      })
    );
    console.debug(
      "DEBUG: clicking send in popup, if present, in " +
        config.actionDelay +
        " ms"
    );
    setTimeout(() => this.clickDone(data, config), config.actionDelay);
  },
  clickDone: function (data, config) {
    var buttons = document.querySelectorAll("button");
    var doneButton = Array.prototype.filter.call(buttons, function (el) {
      return el.textContent.trim() === "Send";
    });
    // Click the first send button
    if (doneButton && doneButton[0]) {
      console.debug("DEBUG: clicking send button to close popup");
      doneButton[0].click();
    } else {
      console.debug(
        "DEBUG: send button not found, clicking close on the popup in " +
          config.actionDelay
      );
    }
    setTimeout(() => this.clickClose(data, config), config.actionDelay);
  },
  clickClose: function (data, config) {
    var closeButton = document.getElementsByClassName(
      "artdeco-modal__dismiss artdeco-button artdeco-button--circle artdeco-button--muted artdeco-button--2 artdeco-button--tertiary ember-view"
    );
    if (closeButton && closeButton[0]) {
      closeButton[0].click();
    }
    console.info(
      "INFO: invite sent to " +
        (data.pageButtonIndex + 1) +
        " out of " +
        data.pageButtonTotal
    );
    config.maxRequests--;
    config.totalRequestsSent++;
    if (data.pageButtonIndex === data.pageButtonTotal - 1) {
      console.debug(
        "DEBUG: all connections for the page done, going to next page in " +
          config.actionDelay +
          " ms"
      );
      setTimeout(() => this.nextPage(config), config.actionDelay);
    } else {
      data.pageButtonIndex++;
      console.debug(
        "DEBUG: sending next invite in " + config.actionDelay + " ms"
      );
      setTimeout(() => this.sendInvites(data, config), config.actionDelay);
    }
  },
  nextPage: function (config) {
    var pagerButton = document.getElementsByClassName(
      "artdeco-pagination__button--next"
    );
    if (
      !pagerButton ||
      pagerButton.length === 0 ||
      pagerButton[0].hasAttribute("disabled")
    ) {
      console.info("INFO: no next page button found!");
      return this.complete(config);
    }
    console.info("INFO: Going to next page...");
    pagerButton[0].click();
    setTimeout(() => this.init({}, config), config.nextPageDelay);
  },
  complete: function (config) {
    console.info(
      "INFO: script completed after sending " +
        config.totalRequestsSent +
        " connection requests"
    );
  },
  totalRows: function () {
    var search_results = document.getElementsByClassName("search-result");
    if (search_results && search_results.length != 0) {
      return search_results.length;
    } else {
      return 0;
    }
  },
};

Linkedin.init({}, Linkedin.config);

ClickDone "Send without a Note" Logic wasn't working for me, I resolved it using below code !
Hope it helps !

Just set addNote: false, in the configs and modify the clickDone function in the script

async clickDone(data, config) {
  await new Promise((resolve) => setTimeout(resolve, 800));

  const sendWithoutBtn = Array.from(
    document.querySelectorAll(
      "button, input[type='button'], input[type='submit']",
    ),
  ).find(
    (btn) =>
      (btn.innerText && btn.innerText.includes("Send without")) ||
      (btn.value && btn.value.includes("Send without")),
  );

  if (sendWithoutBtn) {
    console.debug("DEBUG: clicking 'Send without' button to close popup");
    sendWithoutBtn.click();
  } else {
    console.debug(
      "DEBUG: 'Send without' button not found, clicking close on the popup in " +
        config.actionDelay,
    );
  }

  setTimeout(() => this.clickClose(data, config), config.actionDelay);
},

Hello, the tag to refer to next page has been changed, in nextPage you can use: let nextButton = document.querySelector('button[aria-label="Next page"][data-testid="pagination-control-next-btn"]:not([disabled])');

last working script I use to add connections (no message is sent) is:

Linkedin = {
config: {
scrollDelay: 3000,
actionDelay: 4000,
nextPageDelay: 9000,
maxRequests: -1,
totalRequestsSent: 0,
addNote: false,
note: "Hello"
},
init: function () {
console.info("INFO: script initialized on the page...");
setTimeout(() => this.scrollBottom(), this.config.scrollDelay);
},
scrollBottom: function () {
window.scrollTo({ top: document.body.scrollHeight, behavior: 'smooth' });
setTimeout(() => this.scrollTop(), this.config.scrollDelay);
},
scrollTop: function () {
window.scrollTo({ top: 0, behavior: 'smooth' });
setTimeout(() => this.findConnectButtons(), this.config.scrollDelay);
},
findConnectButtons: function () {
let buttons = document.querySelectorAll("button");
let connectButtons = [...buttons].filter(btn => btn.textContent.trim() === "Connect");

    if (connectButtons.length === 0) {
        console.warn("No 'Connect' buttons found. Moving to next page...");
        setTimeout(() => this.nextPage(), this.config.nextPageDelay);
    } else {
        console.info(`Found ${connectButtons.length} 'Connect' buttons`);
        this.sendInvites(connectButtons, 0);
    }
},
sendInvites: function (buttons, index) {
    if (index >= buttons.length || this.config.maxRequests === 0) {
        console.info("Finished sending invites on this page.");
        setTimeout(() => this.nextPage(), this.config.nextPageDelay);
        return;
    }

    buttons[index].click();
    console.debug("Clicked 'Connect' button");

    setTimeout(() => this.clickSendWithoutNote(buttons, index), this.config.actionDelay);
},
clickSendWithoutNote: function (buttons, index) {
    let sendWithoutNoteButton = document.querySelector("button[aria-label='Send without a note']");
    if (sendWithoutNoteButton) {
        sendWithoutNoteButton.click();
        console.info("Clicked 'Send without a note'");
    } else {
        console.warn("'Send without a note' button not found, closing popup.");
        let closeButton = document.querySelector(".artdeco-modal__dismiss");
        if (closeButton) closeButton.click();
    }
    
    this.config.totalRequestsSent++;
    this.config.maxRequests--;
    setTimeout(() => this.sendInvites(buttons, index + 1), this.config.actionDelay);
},
nextPage: function () {
let nextButton = document.querySelector('button[aria-label="Next page"][data-testid="pagination-control-next-btn"]:not([disabled])');
    if (nextButton) {
        nextButton.click();
        console.info("Navigating to next page...");
        setTimeout(() => this.init(), this.config.nextPageDelay);
    } else {
        console.info("No more pages to process.");
    }
}

};

Linkedin.init();

Fixed Connect Button selection , its a link (a) now and not a Button, also selected the Next button selection, using a fixed attribute => Tested = OK

Linkedin = {
  config: {
    scrollDelay: 1000,
    actionDelay: 250,
    nextPageDelay: 250,
    maxRequests: -1,
    totalRequestsSent: 0,
  },
  init: function (data, config) {
    console.info("INFO: script initialized on the page...");

    console.debug(
      "DEBUG: scrolling to bottom in " + config.scrollDelay + " ms"
    );
    setTimeout(() => this.scrollBottom(data, config), config.actionDelay);
  },
  scrollBottom: function (data, config) {
    window.scrollTo({ top: document.body.scrollHeight, behavior: "smooth" });

    console.debug("DEBUG: scrolling to top in " + config.scrollDelay + " ms");

    setTimeout(() => this.scrollTop(data, config), config.scrollDelay);
  },
  scrollTop: function (data, config) {
    window.scrollTo({ top: 0, behavior: "smooth" });

    console.debug(
      "DEBUG: inspecting elements in " + config.scrollDelay + " ms"
    );

    setTimeout(() => this.inspect(data, config), config.scrollDelay);
  },
  inspect: function (data, config) {
    var totalRows = this.totalRows();

    console.debug("DEBUG: total search results found on page are " + totalRows);

    if (totalRows >= 0) {
      this.compile(data, config);
    } else {
      console.warn("WARN: end of search results!");
      this.complete(config);
    }
  },
  compile: function (data, config) {
    var elements = document.querySelectorAll("a");

    data.pageButtons = [...elements].filter(function (element) {
      return element.textContent.trim() === "Connect";
    });

    if (!data.pageButtons || data.pageButtons.length === 0) {
      console.warn("ERROR: no connect buttons found on page!");
      console.info("INFO: moving to next page...");
      setTimeout(() => {
        this.nextPage(config);
      }, config.nextPageDelay);
    } else {
      data.pageButtonTotal = data.pageButtons.length;
      console.info("INFO: " + data.pageButtonTotal + " connect buttons found");
      data.pageButtonIndex = 0;
      console.debug(
        "DEBUG: starting to send invites in " + config.actionDelay + " ms"
      );
      setTimeout(() => {
        this.sendInvites(data, config);
      }, config.actionDelay);
    }
  },
  sendInvites: function (data, config) {
    console.debug("remaining requests " + config.maxRequests);

    if (config.maxRequests == 0) {
      console.info("INFO: max requests reached for the script run!");
      this.complete(config);
    } else {
      console.debug(
        "DEBUG: sending invite to " +
        (data.pageButtonIndex + 1) +
        " out of " +
        data.pageButtonTotal
      );
      var button = data.pageButtons[data.pageButtonIndex];
      button.click();
      console.debug(
        "DEBUG: clicking send in popup, if present, in " +
        config.actionDelay +
        " ms"
      );
      setTimeout(() => this.clickSend(data, config), config.actionDelay);
    }
  },
  clickSend: function (data, config) {
    var buttons = document.querySelectorAll("button");

    var sendButton = Array.prototype.filter.call(buttons, function (el) {
      return el.textContent.trim() === "Send without a note";
    });

    // Click the first send button
    if (sendButton && sendButton[0]) {
      console.debug("DEBUG: clicking send button to close popup");
      sendButton[0].click();
    } else {
      console.debug(
        "DEBUG: send button not found, clicking close on the popup in " +
        config.actionDelay
      );
    }

    setTimeout(() => this.clickClose(data, config), config.actionDelay);
  },
  clickClose: function (data, config) {
    var closeButton = document.getElementById("ember1683");

    if (closeButton) {
      closeButton.click();
    }

    console.info(
      "INFO: invite sent to " +
      (data.pageButtonIndex + 1) +
      " out of " +
      data.pageButtonTotal
    );

    config.maxRequests--;
    config.totalRequestsSent++;

    if (data.pageButtonIndex === data.pageButtonTotal - 1) {
      console.debug(
        "DEBUG: all connections for the page done, going to next page in " +
        config.actionDelay +
        " ms"
      );
      setTimeout(() => this.nextPage(config), config.actionDelay);
    } else {
      data.pageButtonIndex++;
      console.debug(
        "DEBUG: sending next invite in " + config.actionDelay + " ms"
      );
      setTimeout(() => this.sendInvites(data, config), config.actionDelay);
    }
  },
  nextPage: function (config) {
    /*
	var pagerButton = document.getElementsByClassName(
      "artdeco-pagination__button--next"
    );
	*/
	var pagerButton = document.querySelectorAll('button[data-testid="pagination-controls-next-button-visible"]');


    if (
      !pagerButton ||
      pagerButton.length === 0 ||
      pagerButton[0].hasAttribute("disabled")
    ) {
      console.info("INFO: no next page button found!");
      return this.complete(config);
    }

    console.info("INFO: Going to next page...");
    pagerButton[0].click();
    setTimeout(() => this.init({}, config), config.nextPageDelay);
  },
  complete: function (config) {
    console.info(
      "INFO: script completed after sending " +
      config.totalRequestsSent +
      " connection requests"
    );
  },
  totalRows: function () {
    var search_results = document.getElementsByClassName("search-result");
    if (search_results && search_results.length != 0) {
      return search_results.length;
    } else {
      return 0;
    }
  },
};

Linkedin.init({}, Linkedin.config);