I am usine everest for like a year now, but it has bien a few days I can't open it. I can still open Celeste btw. In the task manager, Celeste (32 bits) appears, like always, but after like 1 minute, a windows problem things opens up, and then Celeste (32 bits) disappears from the task manager.
#everest won't start for some reason.
mystic storm
verbal reef
I am usine everest for like a year now, but it has bien a few days I can't open ...
i'm assuming you're using olympus
click on Manage in the bottom left, click on Browse, a folder should open up; find and send the log.txt from the folder
verbal reef
hm
it just cuts off after registering collabs
disable all your mods and try again
also a reminder that having sj and sc2020 at the same time on stable is not exactly a great idea 
you could run into out of memory errors
@mystic storm try disabling TASHelper?
and also i recommend disabling some more mods since i'm sure you'll run into an oom next
dull matrixBOT
Having too many large mods installed (especially collabs and mods with high resolution images) can cause out of memory errors, which can appear as crashes or texture corruptions.
This can be fixed by disabling any mods you aren't using, which you can do by toggling them in the Olympus mod menu, adding their filenames to the blacklist.txt file in the Mods folder, or if your game can launch, by turning them off in Mod Options.
If this doesn't fix the issue, either you haven't disabled enough mods, or (less likely), it's another type of error.
Note that Celeste is 32-bit on Windows systems, so only has access to around 4GB of memory. This means that out of memory errors can still happen even if you have plenty of memory free.
The only way around this limitation is to use the core version of Everest, marked "(core)" in olympus, which converts it into a 64-bit application. Please read #modding_announcements message for additional information about the core version.