He found the solution wasn't just reinstalling the game, but ensuring the correct version of the launcher was communicating with the game.
Incorrect compatibility settings can block DLL loading.
Add the Assassin's Creed Unity installation folder to your antivirus "Exclusions" list so it doesn't happen again. 3. Reinstall Ubisoft Connect
If the error persists, proceed with the solutions below.
Select , uninstall it, and choose No if it asks to delete your downloaded games.