Hi everybody,
this ist my first post, so please be gentle.
I'm new to XAMPP-VM. I updated to macOS 11.3 yesterday and I ran into the exact same problem.
The solution from https://community.bitnami.com/t/bitnami-wordpress-mac-os-11-3-big-sur-error-starting-wordpress-stack/94776 worked for me (start from comment #9).
A new version of the hyperkit executable seems to do the trick.
Hope that helps anyone.
Have a nice day.
Greetings from fegie