I'm stuck on 100% File Size calculation no matter what setting I try. It won't show a preview. I have a relatively small (12 pages) document I'm trying to export. Preflight has no errors, I've nitpicked it thoroughly already to make sure none of that was stopping it from exporting. I've successfully exported documents just days ago before I did the latest update - I had some previous version of 2.3, whatever first allowed the creation of Alt Text on images/objects.
I'm really stumped. I've already asked some layout friends for help and they said to come here. I'm not sure if I need to downgrade back to the version that worked or if this is a problem anyone knows how to fix.
Edit: Solved my own problem. Maybe useful for others. I eventually found another thread describing a similar problem, tried unchecking Tagged PDF and that wasn't the problem, Rasterizing my gausian blurred objects didn't help. Eventually I tried making my preflight even stricter and found there was a 0 DPI (?????) invisible glitch image created somehow on a couple pages. I removed and reapplied those pages' masters and that fixed the problem.