PackagingResults:Error: Error Unknown Cook Failure

I posted that a couple days ago but the problem still persists even after doing those things mentioned in the comments… Everytime I try to build my game it gives this error:

I deleted Saved and Intermediate folders also, no luck :frowning:

Can somebody please help me with this?

Wow. It was the MODO material plugin!! Thats why I couldnt package the game… I disabled it and now everything is working fine :))))