Hello antonio6643.
Is this a game you've made that you've finished and want to make some scripts for it? If so i would recommend you to see how many ''objects/items'' you have in the ''total game''. Too many plugins and in-game objects can be the reason this is happening.
If i'm completely bananas, excuse me. My second recommendation would be to manually search for the problem at: https://en.help.roblox.com/
Hope this helps!
SupraSkyBro
So, I went in and disable the plugin, and it started working. I don't think it was the plugin breaking it, perhaps the system roblox uses to load the plugins.
I'm Batman