Engine crash everytime I point details tab

I’m posting again the same question, because the other post is still not approved after 24 hours? And it’s urgent, because my game needs patch asap and I can’t deliver it.

https://we.tl/sO8zBlt8wm we transfer
Or
Log file open, 05/25/17 19:23:44LogInit:Display: Running engine for game: Migr - Pastebin.com
pastebin

The log.

Let me share details.
The project crashes everytime I point a mesh .etc in the level the engine freezes and crashed in the following 1-2 seconds.

The only thing I did before noticing this was importing an fbx model with animations which took suspeciously too long to load and later save the .umap. I’ve deleted it, but the glitch is still thre.

Please, someone look.

disabled the real-time thumbnails under the content and the glitch is gone… it’s not a fix, but at least helps.