i don't know what i'm doing wrong, i have the same config on 2 server and on one it doesn't work

Failed to run a 1.00 timer in 'Rustcord v1.3.1' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.Rustcord.m__2 () [0x00011] in :0
at Oxide.Core.Libraries.Timer+TimerInstance.FireCallback () [0x00018] in <4452f821def6406d834e4149849fe7ea>:0