For whatever it’s worth, it feels to me like this is a profile corruption problem and not a server online/offline problem. Other players are able to play, and creating a brand new profile has apparently worked for some people. Don’t know how/why the profiles are corrupted, but that seems to be the issue. Now if IOI would fix it, that would be great.
Apparently it’s happening for both PC (me and others) as well as PlayStation players. I don’t know if I’ve seen any Xbox players reporting this yet though.
The FAQ in the launch guide is now updated with a statement that they’re trying to fix the issue (for PS players at least - no mention of the PC side). HITMAN 3 - Player Guide - IO Interactive