So I've spent the past 4 days working on my biggest piece ever in Sai. I saved it last night, and I go to open it this morning after starting up my computer, and Canvas Fails to Open. I tried restarting and trying to open it over and over again, but it wont work.. ;w;
Does anyone know how to fix that, or am I just fucked and have to try and redo a piece all in one day TT~TT *faceplants*

It's a .sai file as I only save in .sai and then pngs once im done since i rarely need photoshop. ;w;
If i cant get this working im gonna be so pissed and depressed, i just spent a good 30+ hours on this and was so close to finishing... ;w;