Whonix for VirtualBox depends on underlying components such as Linux, Debian, VirtualBox. If any of these dependency components breaks, it’s game over.
For organisational background, see:
This is a duplicate of:
Tor Browser crashing in Whonix VirtualBox since upgrade to Host Linux Kernel version 5.10.0-15
This is the latest update which I posted just now:
Tor Browser crashing in Whonix VirtualBox since upgrade to Host Linux Kernel version 5.10.0-15 - #33 by Patrick
Sufficient to keep reading from there if low on time.
Closing this forum thread since it’s a duplicate.