Error: “Could not connect to your MCP server” when using multiple MCP servers in n8n

Hi everyone,
I’m working on an n8n workflow that uses two MCP servers — one for Google Sheets and another for Google Calendar. Each has its own HTTP endpoint configured. However, when I run the workflow, I get the error: **“Could not connect to your MCP server.”
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I’d appreciate any help figuring out why this happens and how to fix it. Thanks!