Ayer creé un bot de Discord usando Discord.JS y funciona correctamente cuando uso mi bot localmente, pero después de alojarlo en Heroku ya no funciona y el bot está desconectado. En los registros de Heroku puedo ver esto:

 2021-09-15T13:39:08.604792+00:00 heroku[worker.1]: State changed from crashed to starting 2021-09-15T13:39:10.850210+00:00 heroku[worker.1]: Starting process with command `node index.js` 2021-09-15T13:39:11.455306+00:00 heroku[worker.1]: State changed from starting to up 2021-09-15T13:39:12.189682+00:00 heroku[worker.1]: Process exited with status 0 2021-09-15T13:39:12.264472+00:00 heroku[worker.1]: State changed from up to crashed 2021-09-15T13:39:12.039073+00:00 app[worker.1]: (node:4) UnhandledPromiseRejectionWarning: ReferenceError: AbortController is not defined 2021-09-15T13:39:12.039088+00:00 app[worker.1]: at RequestHandler.execute (/app/node_modules/discord.js/src/rest/RequestHandler.js:172:15) 2021-09-15T13:39:12.039088+00:00 app[worker.1]: at RequestHandler.execute (/app/node_modules/discord.js/src/rest/RequestHandler.js:176:19) 2021-09-15T13:39:12.039088+00:00 app[worker.1]: at RequestHandler.push (/app/node_modules/discord.js/src/rest/RequestHandler.js:50:25) 2021-09-15T13:39:12.039089+00:00 app[worker.1]: at async WebSocketManager.connect (/app/node_modules/discord.js/src/client/websocket/WebSocketManager.js:128:9) 2021-09-15T13:39:12.039089+00:00 app[worker.1]: at async Client.login (/app/node_modules/discord.js/src/client/Client.js:245:7) 2021-09-15T13:39:12.039090+00:00 app[worker.1]: (Use `node --trace-warnings ...` to show where the warning was created) 2021-09-15T13:39:12.039423+00:00 app[worker.1]: (node:4) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2) 2021-09-15T13:39:12.039451+00:00 app[worker.1]: (node:4) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

No sé por completo cuál es la razón de ese error. si alguien me pudiera ayudar me alegraria