Error when entering a theater (private and public)

[Christpilled]

So whenever I enter a theater in cinema_theatron, I get a "script issues" warning and an error in console. Here's what the error looks like:
[cinema] addons/cinema/gamemodes/cinema/gamemode/extensions/cl_draw.lua:26: bad argument #1 to 'SetMaterial' (IMaterial expected, got no value)

1. SetMaterial - [C]:-1
2. HTMLTexture - addons/cinema/gamemodes/cinema/gamemode/extensions/cl_draw.lua:26
   3. v - addons/cinema/gamemodes/cinema/gamemode/modules/theater/cl_draw.lua:74
   4. unknown - lua/includes/modules/hook.lua:84 (x13)

I've tried restarting Gmod, unsubbing and subbing back to the gamemode but nothing worked. Any fixes?