Problems In Project 64 That Make No Sense

I was running Project 64 perfectly fine yesterday. Perfectly fine. No problems, smooth, and nothing to worry about. Then today, I try to open it up, and I get this error:


What could have gone wrong? All I did was turn off my computer for the night, turned it on today, and suddenly it doesn't work. Someone tell me how to fix this, I have no clue...

there are several solutions to this problem.
1.if you used a software like 3D analyze or swift shader you have to delete everything from the project 64 folder the n reinstall it.
2.Try reinstalling Project 64
3.try updating your drivers or at least reinstall them

if that doesn't work send me a pm

Definitly looks more like a driver error as "D3D" is Direct3D.