ERR_NGROK_1913: The uploaded certificate's x509 Basic Constraints did not mark it as a certificate authority (see RFC 5280, 4.2.1.9)

What does ERR_NGROK_1913 mean?

ngrok returns ERR_NGROK_1913 with this message:

The uploaded certificate's x509 Basic Constraints did not mark it as a certificate authority (see RFC 5280, 4.2.1.9).

Troubleshoot ERR_NGROK_1913 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.