This is most likely hardware-related, and in your case VM-related, but let’s try to help you anyways.
May you share your Diagnosis report? Specifically I want to know about your memory and swap(s).
(I’m loosely following what I found online with these keywords, namely kernel - watchdog: BUG: soft lockup - CPU#6 stuck for 23s - Ask Ubuntu and linux - Ubuntu VM hangs in VirtualBox under Window 10: "watchdog BUG: soft lockup - CPU#0 stuck for 23s" - Super User )