ERR_NGROK_15001: The Webhook Verification secret exceeds the maximum length of MAX, got SIZE - ngrok documentation

What does ERR_NGROK_15001 mean?

ngrok returns ERR_NGROK_15001 with this message:

The Webhook Verification secret exceeds the maximum length of <MAX>, got <SIZE>.

Where can I get more help with ERR_NGROK_15001?

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