ERR_NGROK_6531: The tunnel group label key/value ID may not contain '=' characters

What does ERR_NGROK_6531 mean?

ngrok returns ERR_NGROK_6531 with this message:

The tunnel group label key/value <ID> may not contain '=' characters.

Troubleshoot ERR_NGROK_6531 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

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