MCP connected and tool called but ConnectorClientServerError: 500: "Server returned 500: 'Request timeout'" in response in chat

Today I got the error message: ConnectorClientServerError: 500: “Server returned 500: ‘Request timeout’”

When my custom MCP tool is called, it waits for so long and no answers come.

A few days ago, this was still normal.

I tried with VS Code to check if there is something wrong with my MCP server, but the chat is normal as it should be.

I suspect that something has broken down in ChatGPT recently.