So uhhh, Strucid randomly broke even though I didn’t update the game? There seems to be this module error when it’s requested. This error is appearing across all public servers but not in Studio. This bug has happened to me a few months ago and it solved itself after a few hours. Probably a Roblox bug.
Roblox changed a flag that enabled their new experimental Lua VM (as introduced in What's Coming in 2019: This Year's Developer Roadmap). It seems to be causing issues for several games so I am guessing it will be reverted soon.