[Release] New Player Spawn Tutorial UI (Add a beautiful tutorial for your server!) [v1.2]

Error resuming coroutine: server.lua:53: bad argument #1 to ‘gmatch’ (string expected, got nil)
stack traceback:
[C]: in function ‘string.gmatch’
server.lua:53: in function ‘stringsplit’
server.lua:66: in function ‘addNewUser’
server.lua:99: in function ‘loopUpdateUsers’
server.lua:102: in function server.lua:1

I fixed with [SOLVED][help]stringsplit not working right

But gives this:
Error running system event handling function for resource fivem-spawn-tutorial: citizen:/scripting/lua/scheduler.lua:41: Failed to execute thread: server.lua:78: bad argument #1 to ‘len’ (string expected, got nil)
stack traceback:
[C]: in function ‘string.len’
server.lua:78: in function ‘addNewUser’
server.lua:37: in upvalue ‘handler’
citizen:/scripting/lua/scheduler.lua:175: in function citizen:/scripting/lua/scheduler.lua:174
stack traceback:
[C]: in function ‘error’
citizen:/scripting/lua/scheduler.lua:41: in field ‘CreateThreadNow’
citizen:/scripting/lua/scheduler.lua:174: in function citizen:/scripting/lua/scheduler.lua:138