Garmin Express v7.27.0 crashes immediately after start. It does not start any more, force-quit is the only option to escape this mess. What should I do?

Garmin Express v7.27.0 crashes immediately after start. It does not start any more, force-quit is the only option to escape this mess.

The Garmin Express Service is stuck and after a few minutes locks the entire computer including keyboard input and other processes.

What should I do?