InternalOAuthError: Failed to obtain access token

[tdinckaya]

When I want to get access token with Github, I get the following error. After the callback, it gives an error like the one below.

InternalOAuthError: Failed to obtain access token
at Strategy.OAuth2Strategy._createOAuthError (/APP/code-push-server-standalone/api/node_modules/passport-oauth2/lib/strategy.js:423:17)
at /APP/code-push-server-standalone/api/node_modules/passport-oauth2/lib/strategy.js:177:45
at /APP/code-push-server-standalone/api/node_modules/oauth/lib/oauth2.js:191:18
at ClientRequest. (/APP/code-push-server-standalone/api/node_modules/oauth/lib/oauth2.js:162:5)
at ClientRequest.emit (node:events:513:28)
at ClientRequest.emit (node:domain:489:12)
at TLSSocket.socketErrorListener (node:_http_client:494:9)
at TLSSocket.emit (node:events:513:28)
at TLSSocket.emit (node:domain:489:12)
at emitErrorNT (node:internal/streams/destroy:157:8)

[vaidyakhil]

on adding some logs, I found that the error at oauth/lib/oauth2.js:191 was an SSL error:
Error: self-signed certificate in certificate chain when I was using the application under a VPN.

Had to add NODE_TLS_REJECT_UNAUTHORIZED=0 in the .env to get it to work, might be relevant to add in the README.md or the example env file itself