Cannot launch gdb debugging session by remote-ssh

Type: Debugger

Describe the bug

• OS and Version:
  • host: macos
  • remote: ubuntu18.04
• VS Code Version:1.52.0
• C/C++ Extension Version:1.1.3
• Other extensions you installed (and if the issue persists after disabling them):
  • host:Remote-SSH
  • remote: CMake tools, python
• A clear and concise description of what the bug is.
  I worked on a mac and developed on a remote Linux server by remote-ssh. Nonw I can compile projects and debug them on the command line with GDB. But when I start the debugger, a blue loading bar appears under the arrow and nothing happens. I've added logging to launch.json, but output window only print "Launch configuration" and debug console print nothing.

Additional context
launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",

            "program":"cartoonDemo.out",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}/build",
            "externalConsole": false,
            "MIMode": "gdb",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ],
            "logging": {
                "trace": true,
                "traceResponse": true,
                "engineLogging": true
            },
        }
    ]
}

Start with the launch.json configuration and reproduce the debugging session through Remote-SSH, comparing it with the command-line GDB session on the remote Ubuntu host. Review the trace, traceResponse, and engineLogging output; done means the configured program launches and produces debugger output instead of remaining on the loading bar.