ERR_NGROK_256: Only the access token's owner or an account admin can change it

What does ERR_NGROK_256 mean?

ngrok returns ERR_NGROK_256 with this message:

Only the access token's owner or an account admin can change it.

Troubleshoot ERR_NGROK_256 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.