ERR_NGROK_2212: Failed to parse configuration for PHASE TYPE: can have at most MAX header values, but VAL were provided - ngrok documentation

What does ERR_NGROK_2212 mean?

ngrok returns ERR_NGROK_2212 with this message:

Failed to parse configuration for <PHASE> <TYPE>: can have at most <MAX> header values, but <VAL> were provided.

Troubleshoot ERR_NGROK_2212 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_2212?

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