Can't debug with Nucleo STM32F411RE : STLink error (22)

Thank you Jerome for looking into this issue. Unfortunately, neither
mbed_app.json:

{
    "target_overrides": {
        "*": {
            "target.gpio_reset_at_init": false
        }
    }
}

nor

{
    "target_overrides": {
        "*": {
            "target.gpio_reset_at_init": 0
        }
    }
}

fixed the issue.

Happy new year and best regards, Zoltan