It is a very long script though you only need to read a maximum of 30 lines... (Please excuse how messy it is...)
Errors occur on line 126, 117, and 50 (That I know of)
Apparently, those specific functions think that the function 'GetPlayerData' (On line 58) is nil, even though my tests prove otherwise.
The error occurs only in Online Mode, it works perfectly fine in solo...

1 comment
The functions already only run after everything has been defined. Thanks for being the only one to answer after 13 hours though.