Feel free to delete this thread unsub/resub eventually fixed it.
I'm getting the below errors on launching the game on a fresh install with just the UO collection subscribed and installed. All the appropriate mods are loaded, but it still appears. As far as I'm aware, the Apache should be part of the 3CB vehicles pack, and I can see a pbo and BISIGN for it in Arma 3\!Workshop\@3CB BAF Vehicles\Addons.
I'm also losing the session shortly after joining. This is more annoying.
2. Verify ARMA files
3. Repair Mod from ARMA Launcher
4. Unsub/resub from mod (seemed to fix both issues)
p.s. It would appear that I'm back. For a while, at least.