Storyline Publishing Error

Also experiencing sudden problems. Namely, with a file I am using on a SSD (opens, edit, save - all working fine) get stuck on any type of Preview (single slide works, but not entire project) and even worse on any type of Publishing (LMS in particular is the one I need, for the file is ready for publication). 3/4 down the progress bar it gets stuck and I tried to use different computers but it's the same. I moved the file into the internal hard disk, also tried to copy, modify (which is working fine) and also to take some slides and move it over to a file that was previously working (adding slides to a project that I had published earlier) but when it comes to publishing it always return the same error. It's not dependent on the laptop, cause the same problem happens on three different laptops I use. If I try to publish a new simple test project it works. As soon as I import the slides from the previous file (also a subsection, not all of them) then it's back to no publishing. I opened a ticket but if someone has any ideas I would be grateful.