ERR_NGROK_5523: PROVIDER rejected authorization as the redirect URL for this application is improperly configured: DESCRIPTION - ngrok documentation

What does ERR_NGROK_5523 mean?

ngrok returns ERR_NGROK_5523 with this message:

<PROVIDER> rejected authorization as the redirect URL for this application is improperly configured: <DESCRIPTION>.

Contact the owner of this application in order to fix this error.

Troubleshoot ERR_NGROK_5523 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Where can I get more help with ERR_NGROK_5523?

Email support@ngrok.com and include the error code.