Hiya!
We’ve generally seen this occur on systems with 1GB of VRAM. Due to the amount of Textures & Models within the game we can only support systems with 2GB+.
Version 0.3 still had some leeway with the amount of memory the game was using but with the update to 0.4 it seems like we’ve crossed that limit. Sadly we can’t really do anything about this.
If your system has more than 1GB of VRAM feel free to check into the Discord or shoot a mail to contact@monsterbox.moe so we can investigate this further!