You cannot save the game at the moment (The Elder Scrolls 5: Skyrim)

when you try to save the game through the console, it gives this inscription on the left from the top "you can not save the game at the moment", f5 does not work, does not respond, through esc the "save game" button is gray and not clickable, the settings and controls are the same, exit from the location and entering it does not create a save, does not even give time to rewind, I play the RFAB LE assembly, I think the problem is in the save itself, because when you start a new game everything works, the rollback will not be possible because I went softlocked, help with advice , I can throw off the save myself to see