Valenthian's PlaneModule; Unable to have multiple Planes, unable to regen. Help?

https://www.roblox.com/library/589896194/PlaneModule

I used this to make a plane for a game. I want people to be able to spawn planes from areas, but there's some sort of error with the scripting (which is above my capability, sadly) which makes it impossible to use more than one, and makes it unusable if you regen it using the go-to method of regen.

The plane works fine until you try to regen it. It will regen, but be broken.

If you place two planes in the game, one works perfectly fine, but the other has the exact same error as the working one would if it were regen'd.

This is the error I'm getting in output.

19:32:46.738 - Workspace.Player1.FlyClient:16: attempt to index local 'GetMain' (a nil value)
19:32:46.739 - Stack Begin
19:32:46.741 - Script 'Workspace.Player1.FlyClient', Line 16
19:32:46.741 - Stack End

The reason I posted the model at the top instead of the coding here is because I honestly have no clue what all one would need to look at to solve this. I've looked through the scripts and I'm confused. The scripts seem to work in tandem via remote functions and events, which I have no experience with.

Bottom line, I need this to be able to regen and I need to be able to have multiple planes in the place at once without them breaking.

If anyone could help, I would greatly appreciate it. I've tried messaging Valenthian, but have received no reply.