serpbear: Error Saving the Google Ads Refresh Token

When trying to authenticate with Google Ads account, getting this: “Error Saving the Google Ads Refresh Token. Please Try Again!”. Container volume is writable. Logs are as below:

[0] [Error] Getting Google Ads Refresh Token!
[0] error : GaxiosError: invalid_grant
[0]     at Gaxios._request (/app/node_modules/gaxios/build/src/gaxios.js:142:23)
[0]     at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
[0]     at async OAuth2Client.getTokenAsync (/app/node_modules/google-auth-library/build/src/auth/oauth2client.js:137:21)
[0]     at async getAdwordsRefreshToken (/app/.next/server/pages/api/adwords.js:143:27)
[0]     at async Object.apiResolver (/app/node_modules/next/dist/server/api-utils/node.js:366:9)
[0]     at async NextNodeServer.runApi (/app/node_modules/next/dist/server/next-server.js:481:9)
[0]     at async Object.fn (/app/node_modules/next/dist/server/next-server.js:741:37)
[0]     at async Router.execute (/app/node_modules/next/dist/server/router.js:252:36)
[0]     at async NextNodeServer.run (/app/node_modules/next/dist/server/base-server.js:365:29)
[0]     at async NextNodeServer.handleRequest (/app/node_modules/next/dist/server/base-server.js:303:20) {
[0]   config: {
[0]     method: 'POST',
[0]     url: 'https://oauth2.googleapis.com/token',
[0]     data: '<<REDACTED> - See `errorRedactor` option in `gaxios` for configuration>.',
[0]     headers: {
[0]       'Content-Type': 'application/x-www-form-urlencoded',
[0]       'User-Agent': 'google-api-nodejs-client/9.6.3',
[0]       'x-goog-api-client': 'gl-node/20.11.1'
[0]     },
[0]     paramsSerializer: [Function: paramsSerializer],
[0]     body: '<<REDACTED> - See `errorRedactor` option in `gaxios` for configuration>.',
[0]     validateStatus: [Function: validateStatus],
[0]     responseType: 'unknown',
[0]     errorRedactor: [Function: defaultErrorRedactor]
[0]   },
[0]   response: {
[0]     config: {
[0]       method: 'POST',
[0]       url: 'https://oauth2.googleapis.com/token',
[0]       data: '<<REDACTED> - See `errorRedactor` option in `gaxios` for configuration>.',
[0]       headers: [Object],
[0]       paramsSerializer: [Function: paramsSerializer],
[0]       body: '<<REDACTED> - See `errorRedactor` option in `gaxios` for configuration>.',
[0]       validateStatus: [Function: validateStatus],
[0]       responseType: 'unknown',
[0]       errorRedactor: [Function: defaultErrorRedactor]
[0]     },
[0]     data: { error: 'invalid_grant', error_description: 'Bad Request' },
[0]     headers: {
[0]       'alt-svc': 'h3=":443"; ma=2592000,h3-29=":443"; ma=2592000',
[0]       'cache-control': 'no-cache, no-store, max-age=0, must-revalidate',
[0]       'content-encoding': 'gzip',
[0]       'content-type': 'application/json; charset=utf-8',
[0]       date: 'Wed, 06 Mar 2024 10:30:44 GMT',
[0]       expires: 'Mon, 01 Jan 1990 00:00:00 GMT',
[0]       pragma: 'no-cache',
[0]       server: 'scaffolding on HTTPServer2',
[0]       'transfer-encoding': 'chunked',
[0]       vary: 'Origin, X-Origin, Referer',
[0]       'x-content-type-options': 'nosniff',
[0]       'x-frame-options': 'SAMEORIGIN',
[0]       'x-xss-protection': '0'
[0]     },
[0]     status: 400,
[0]     statusText: 'Bad Request',
[0]     request: { responseURL: 'https://oauth2.googleapis.com/token' }
[0]   },
[0]   error: undefined,
[0]   status: 400,
[0]   [Symbol(gaxios-gaxios-error)]: '6.3.0'
[0] }