I know i'm a stupid - but want to share with own ctd experience - it's may lead to textures problem. 1) I take textures from skyrim without convert - game start, but when you wear armor with that texture and use fast travel - game ctd. If you save with that armor and then load a game - game ctd. I fixed this problem - open a all textures files in online photopea and export as dds - all types - normal, diffuse, spectral. 2) Second time i put on texture what is bigger than original dds file - in nifscope says that texture is out of borders - that leads to ctd when game loading a save.