ChatGPT Plugin / MCP Server auth error

ChatGPT Plugin / MCP Server auth error

Hi all
I'm trying to connect the ChatGPT plugin for Zoho CRM but after username stage of the auth process, I get this error.

{"error_description":"Invalid request url, Request is not as per defined in oauth metadata.","error":"mcp_error"}

I've tried in multiple browsers, and tried ChatGPT from the browser itself and the desktop app. 


Any ideas?

Olly