Drywall Nightmare - Help Needed

[Nyx Sherwin]

Hello! Taking the jump into my first BRRR and learning a tough lesson. Many of the interior walls, particularly the exterior walls are in bad shape and I brought in a drywall crew for repairs. And a decent rain the next day most of the walls were bubbling and the drywall was still wet. It seems like water is getting into the house somehow and a new roof is going on next week. Regardless, the exterior walls are something I've never dealt with and seem to be a lot of trouble. It's a block house with plaster directly applied to the block, no vapor barrier, no framing and no drywall. I suspect water is penetrating the block and we need to get the house fired out before we try to repair interior walls but I'm still concerned that drywall mud isn't the solution. Has anyone dealt with something similar? What else should I consider?