I seem to have solved the issue on my end with BullGuard:
- Go to BullGuard settings
- Antivirus -> Advanced settings -> Tuning
- Tick the “Skip files/folders” -> click the “files/folders” hyperlink to bring up a selection -> I chose to exclude the whole Steam folder in my SSD
That has allowed me to launch Vermintide 2 on Official Realm (no mods) multiple times now (as a test).
If anything changes, I’ll be sure to mention it, but I’m pretty hopeful this is fully resolved!