Hello,
I have been using the Unity MCP for a while now. When The AI Beta came out, I signed up for the 14 Day free trial. I created a new Unity Project with 6.4 and for some reason, Claude cannot Connect to the MCP Server. The Server Settings itself state:

Where as in other, older projects it says unlimited. All other MCP related settings seem fine. It shows connected clients (Claude Code) but will reject any command it does. I only have on project running at a time, since I noticed there are limitations to MCP Server used, based on Unity Plan used. I am on a Personal Plan using the 14 Day AI Trial.