ERR_NGROK_3902: Buffering for the body was not successfully initialized for action type ACTIONTYPE - ngrok documentation

What does ERR_NGROK_3902 mean?

ngrok returns ERR_NGROK_3902 with this message:

Buffering for the body was not successfully initialized for action type <ACTIONTYPE>.
ERROR: <ERROR>

Troubleshoot ERR_NGROK_3902 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Where can I get more help with ERR_NGROK_3902?

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