This basic script only works on solo and not server. Any idea why?

wait(44)
game.Lighting.Cut1Part.Parent = game.Workspace

Literally, I don't understand why it won't work on the server...

First of all

game.Lighting.Cut1Part.Parent

is an attempt to move the service Lighting into Workspace. But you placed the parent of Cut1Part which is unnecessary and invalid to place Lighting.

I suggest if you try to move Cut1Part then define the part first. Try doing

local part = game.Lighting.Cut1Part
wait(44)
part.Parent = game.Workspace