ERR_NGROK_1901: No PEM-encoded private key was found in the creation request

What does ERR_NGROK_1901 mean?

ngrok returns ERR_NGROK_1901 with this message:

No PEM-encoded private key was found in the creation request.

Troubleshoot ERR_NGROK_1901 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.