ERR_NGROK_PRIVATE_LINK_FIELD_ILLEGAL_CHARACTER: The FIELD value must be valid UTF-8 and must not contain null bytes

What does ERR_NGROK_PRIVATE_LINK_FIELD_ILLEGAL_CHARACTER mean?

ngrok returns ERR_NGROK_PRIVATE_LINK_FIELD_ILLEGAL_CHARACTER with this message:

The <FIELD> value must be valid UTF-8 and must not contain null bytes.

Troubleshoot ERR_NGROK_PRIVATE_LINK_FIELD_ILLEGAL_CHARACTER 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_PRIVATE_LINK_FIELD_ILLEGAL_CHARACTER?

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