How to fix it Workspace.Heavy.Handle:WaitForChild("Output")? (Fixed)

yo, I can’t understand this problem, I decided to ask for help.

I can’t tell you how to fix it, but I can tell you what it means;
Infinite yield possible on '<Parent Instance Full Name>:WaitForChild("<Child Instance Name>")' means that the parent Instance which WaitForChild() is called on cannot find a child with the specified name after a few seconds.
In your case, it means the “Output” isn’t in the handle when it should be.