I had this same issue. The problem seemed to stem from the integrated Flashing Savegames Fix, which brought the same error in isolated use.
What led to the crashes was (i think) a faulty installation of SkyUI for me. After reinstallating SkyUI and Widescreen with ModOrganizer2 the problem was solved.
Game crash (7 comments)
What led to the crashes was (i think) a faulty installation of SkyUI for me. After reinstallating SkyUI and Widescreen with ModOrganizer2 the problem was solved.
I have SKSE, Sky UI and this mod but no work
Same problem.
Upd. The problem was solved by downloading another file.