I own Scythe, Zombicide, and Superfight.
When I try to load any of those, whether I am hosting or not. the game and all its textures will not load. I can see placeholders for the items but when loading zombicide especially, it says loading dlc and gets stuck at 2%.
I can load steam workshop mods fine. Ive reinstalled 4 times. and run file verification 8 times. it says all the files are there but the issue remains.
Try clearing out your Documents\My Games\Tabletop Simulator\DLC folder before launching the game and a DLC. Let me know if the problem persists after this.