Save File not loading.

I’ve been working on a big project for the past week non-stop and now the save file won’t load. It gets to “Loading Resources” then freezes and an error pops up saying “hl2.exe has stopped working.” If anyone could give me any help at all please do. And thank you in advance.

all i know is this has been happening more often now after the new update, also everyone is missing a vgui material since the new update.