Recently purcahsed AC shadows, tried launching it but kept starting and then stopping itself. Starting on both launchers (Steam and Ubisoft Connect) gives the start and stop issue.

So far my only Fix has been restarting my PC, verifying game files and straight up praying to god it boots.

Fairly certain this is a Ubisoft issue, but thought it would be worthy to post as bug on Steam seen as it is available to be purchased here.