As the title says, I’ve been getting a Runtime error in Roblox Studio. It’s the first time I see this since I started developing on roblox.

It happened when I right clicked a meshpart in Game explorer after importing it from a .fbx file, the studio stopped responding for one good minute and gave me that error, and after I clicked “OK” it automatically closed.
I tried to do it again but I still got the same error after right clicking it.