ERR_NGROK_5403: Event Sources must be configured with fields that match its event type

What does ERR_NGROK_5403 mean?

ngrok returns ERR_NGROK_5403 with this message:

Event Sources must be configured with fields that match its event type. "<FIELD>" is not a "<TYP>" field

Troubleshoot ERR_NGROK_5403 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.