Necropolis – “Misfortune never comes alone” [Campaign 2 – Mission 1]

and then I read somewhere that they stopped supporting it.

So that's why the Conflux keeps disconnecting, it all makes sense now) they're just jerks.

Added 3 minutes later
I played on easy, I tried playing on hard first, everything was fine, but when I saw that the Inquisitor and Karl had twice as many troops as me, I just didn't feel like trying to come up with any strategies, so I decided to replay it, although in principle I think that if I had run away from them for a while, I could have held out for some time, not giving them the opportunity to get reinforcements, then I could have won, but then the completion time would have increased a lot + Salvatore would have had an unreal army in the Castle, as well as the Shimmers guarding Jorgen, so I decided to spare myself this hassle). PS By the way, playing without the dynastic perks in the form of artifacts and bonuses at the beginning of the mission is even more interesting.