OAuth "Invalid redirect" 4700 when using a non-standard port number 5050 8080 (RESOLVED)

My redirect URL is “invalid” - despite being publicly accessible and secure (although on a non-standard port)

{“status”:false,“errorCode”:4700,“errorMessage”:“Invalid redirect: https://nzt.snowballz.org:5055/at","result”:null}

Which App Type (OAuth / Chatbot / JWT / Webhook)?

Which Endpoint/s?

How To Reproduce (If applicable)
Steps to reproduce the behavior:

  1. Attempt to access ‘installation’ URL
  2. See error

Additional context
Please don’t tell me it only works on port 80
Surely this should work?

Thanks in advance

Posting here in case others hit the same issue

For me, turning ON the OAuth allow list and adding (duplicating) the URL there made it work

I imagine it has something to do with the non-standard port number

I did do you all a nice screenshot - but the forum won’t let me post it

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