Ethr-did error message

Error: missing provider (operation="sendTransaction", code=UNSUPPORTED_OPERATION, version=abstract-signer/5.5.0)
    at Logger.makeError (/home/user/ethr-did/node_modules/@ethersproject/logger/src.ts/index.ts:225:28)
    at Logger.throwError (/home/user/ethr-did/node_modules/@ethersproject/logger/src.ts/index.ts:237:20)
    at Wallet.Signer._checkProvider (/home/user/ethr-did/node_modules/@ethersproject/abstract-signer/src.ts/index.ts:330:38)
    at Wallet.<anonymous> (/home/user/ethr-did/node_modules/@ethersproject/abstract-signer/src.ts/index.ts:123:14)
    at step (/home/user/ethr-did/node_modules/@ethersproject/abstract-signer/lib/index.js:48:23)
    at Object.next (/home/user/ethr-did/node_modules/@ethersproject/abstract-signer/lib/index.js:29:53)
    at /home/user/ethr-did/node_modules/@ethersproject/abstract-signer/lib/index.js:23:71
    at new Promise (<anonymous>)
    at __awaiter (/home/user/ethr-did/node_modules/@ethersproject/abstract-signer/lib/index.js:19:12)
    at Wallet.Signer.sendTransaction (/home/user/ethr-did/node_modules/@ethersproject/abstract-signer/lib/index.js:139:16)
    at Object.<anonymous> (/home/user/ethr-did/node_modules/@ethersproject/contracts/src.ts/index.ts:424:42)
    at step (/home/user/ethr-did/node_modules/@ethersproject/contracts/lib/index.js:48:23)
    at Object.next (/home/user/ethr-did/node_modules/@ethersproject/contracts/lib/index.js:29:53)
    at fulfilled (/home/user/ethr-did/node_modules/@ethersproject/contracts/lib/index.js:20:58)
    at processTicksAndRejections (node:internal/process/task_queues:94:5) {
  reason: 'missing provider',
  code: 'UNSUPPORTED_OPERATION',
  operation: 'sendTransaction'
}