Just moved to a new PC. Fresh install of Windows 10 Pro 20H2 and Cubase 11 Pro. The attached zipped .dmp was created when adding Soundtoy’s Little PrimalTap. The same session uses Little Plate and Little Microshift without issues.
The screen filled with popups saying to provide this file and the program eventually closed. Tried reinstalling, and uninstalling/reinstalling.
Learned that hitting CANCEL on the popup prevented more popups, but the plugin GUI was unresponsive (although its window could be moved around with the mouse).
EDIT: Found a post on a REAPER forum from 2017 that mentioned running the DAW as admin. Also tried installing as admin. No change.
EDIT: Looks like Soundtoys only lists compatibility for Cubase 9 - 10.5. I guess that’s my answer for now!