ERR_NGROK_391: You may not request an individual OAuth scope with length greater than MAX - ngrok documentation

What does ERR_NGROK_391 mean?

ngrok returns ERR_NGROK_391 with this message:

You may not request an individual OAuth scope with length greater than <MAX>. Got scope <SCOPE> with length <GOT>.

Troubleshoot ERR_NGROK_391 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_391?

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