errors THU 18-10-2018 ~ TrueBot Error.txt

client.user.setActivity(`${client.guilds.size} Servers`, {
            ^

TypeError: Cannot read property 'setActivity' of null
    at Object.<anonymous> (B:\NODE\DISCORD\DISCORD.JS\TrueBot\src\index.js:15:13)
    at Module._compile (module.js:653:30)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Function.Module.runMain (module.js:694:10)
    at startup (bootstrap_node.js:204:16)
    at bootstrap_node.js:625:3
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! truebot@1.0.0 start: `node index.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the truebot@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\truec\AppData\Roaming\npm-cache\_logs\2018-10-18T21_08_14_240Z-debug.log