Fatal Error - Crash - all progress lost, co-op, map now broken - HELP!

note: we are playing on 2 PCs
My wife & I were playing co-op just now and we both experienced a simultaneous hard-freeze/crash during our first ever visit to a corrupted nexus (having just made it to the first corrupted nexus map node). We were forced to restart POE2, and when we relaunched the game, we didn't have any of the items in our inventory that we picked up during the map run (no big losses, just orbs); but importantly, the corrupted nexus node on the map is now blue and no longer states that it is a nexus or has a boss, and cannot be interacted with, just like a cleared map.

Is it still possible for me to make progress on end game? Doryani's quest indicator still says "travel to the corrupted nexus"... what should we do?