I finished the main game, watched the epilogue, then the credits, got back to the main menu, no problem.
I purchased the season pass, installed Beast of Winter.
Loaded the last autosave, did the final conversation with Eothas, watched the epilogue, and after the
last screen (boat with sunset) the game crashes always.
(the upload .txt file is a .7z file with the compressed crash folder)
2018-08-20_082434.txt