[BUG] Custom MCP server not working

[SeanPedersen]

Describe the bug
Custom MCP server not working - always giving error: MCP error -32000

Same server works fine with Claude Desktop app...

To Reproduce
Install this MCP server: https://github.com/SeanPedersen/digger-solo-mcp-server

Try to add it:

{
  "mcpServers": {
    "Digger Solo MCP server": {
      "command": "uv",
      "args": [
        "run",
        "--with",
        "fastmcp",
        "--with",
        "pycurl",
        "fastmcp",
        "run",
        "/Users/YOUR_USER_NAME/projects/digger-solo-mcp-server/mcp_server.py"
      ]
    }
  }
}

Expected behavior
Working MCP server.

[zerob13]

Please provide the system information and software version