Unknown Errors

Error running system event handling function for resource chat: citizen:/scripting/lua/scheduler.lua:41: Failed to execute thread: sv_chat.lua:42: attempt to concatenate a nil value
stack traceback:
        sv_chat.lua:42: 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>
Connecting: x0Z3ro0x
Sending heartbeat to live-internal.fivem.net:30110
Access denied for command add_principal.
Error running call reference function for resource esx_identity: citizen:/scripting/lua/scheduler.lua:351: server/main.lua:12: attempt to index a nil value (field '?')
stack traceback:
        server/main.lua:12: in upvalue 'ref'
        citizen:/scripting/lua/scheduler.lua:337: in function <citizen:/scripting/lua/scheduler.lua:336>
        [C]: in function 'xpcall'
        citizen:/scripting/lua/scheduler.lua:336: in function <citizen:/scripting/lua/scheduler.lua:335>
stack traceback:
        [C]: in function 'error'
        citizen:/scripting/lua/scheduler.lua:351: in function <citizen:/scripting/lua/scheduler.lua:322>
[ERROR] [MySQL] Check the error above, an error happens when executing the callback from the query : "SELECT * FROM `users` WHERE `identifier` = @identifier {@identifier=steam:1100001080b2cef}"
Error running call reference function for resource es_extended: citizen:/scripting/lua/scheduler.lua:351: server/main.lua:162: attempt to index a nil value (field '?')
stack traceback:
        server/main.lua:162: in upvalue 'ref'
        citizen:/scripting/lua/scheduler.lua:337: in function <citizen:/scripting/lua/scheduler.lua:336>
        [C]: in function 'xpcall'
        citizen:/scripting/lua/scheduler.lua:336: in function <citizen:/scripting/lua/scheduler.lua:335>
stack traceback:
        [C]: in function 'error'
        citizen:/scripting/lua/scheduler.lua:351: in function <citizen:/scripting/lua/scheduler.lua:322>
[ERROR] [MySQL] Check the error above, an error happens when executing the callback from the query : "SELECT * FROM `users` WHERE `identifier` = @identifier {@identifier=steam:1100001080b2cef}"
hitch warning: frame time of 182 milliseconds
x0Z3ro0x: tt
Sending heartbeat to live-internal.fivem.net:30110
Error running system event handling function for resource esx_skin: citizen:/scripting/lua/scheduler.lua:41: Failed to execute thread: server/main.lua:14: attempt to index a nil value (local 'xPlayer')
stack traceback:
        server/main.lua:14: 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>