/vr/ - Retro Games

Just started Doom Builder. Watched first few videos and followed along, but realized I can't test or save maps; this error just comes up. Googling it gives two results; one person who fixed it by changing their nodebuilder, and another who was told his map was too big.

Tried every other nodebuilder, tried just making a box map with a playerspawn in it, watched videos again to figure out what step I missed, ran as admin, restarted computer, reinstalled, tried with Doom instead, tried with zdoom also trying every nodebuilder, still no change

help