Error running call reference function for resource essentialmode: citizen:/scripting/lua/scheduler.lua:351: server/main.lua:218: attempt to index a nil value (field '?')
stack traceback:
        server/main.lua:218: 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>