Can't export Textures in Substance Painter 12.0

Hello everyone, thank you for your reports and your patience! We are releasing a bug fix for this next week. 

Just commenting for visiblity - me and our entire team here at our studio are having this issue since it upgraded to 12.0.0, cannot export anything it just hangs and hangs.

Having the same problem since the update, tried all the other things suggested to fix this issue, tried reinstalling substance painter, resaving file, etc etc.. nothing has worked.

Having the same issue since last update, reverting to the older version does not work either because updated substance painter files can’t be opened with the older versions. Also can’t save and exit substance after the export failure, a window appears saying “viewport texture cache computation in progress”  after trying to close the software but it stucks again. And when it’s killed on the task manager the file gets corrupted. I had this export issue in two files since yesterday. I fixed one by deleting a mask layer with a concrete crack grunge texture. The other file didn’t had a mask layer with a texture like this so I can’t figure out what caused this problem.