Fixed.
Game used to Crash roughly 9 Secs after "Press any key", whilst "Checking for add-ons".

I simply followed the great advice herein (Qudos) from a post I cannot now find (sorry), and Deleted all Assassin's Creed Valhalla:
DLC_XXX folders,
except:
DLC_20,
DLC_207
DLC_211 folders).

Sorted.

I think so I found the solution, try to uninstall the game and Ubisoft connect, and then uninstall windows. Reinstall windows, Ubisoft connect and Ac Valhalla and try to run the game. It's a long process but it worked for me... All the best

I simply followed the great advice herein (Qudos) from a post I cannot now find (sorry), and Deleted all Assassin's Creed Valhalla: DLC_XXX folders, except: DLC_20, DLC_207 DLC_211 folders).Sorted.

Same situation.... there is no solution.
I do fresh installation of windows and ubiconnect, valahalla and all ac saga, but with this title I can't play
Fu## ...........................