Failed to run a 0.30 timer in 'GroupCrafting v1.0.2'

gcraft vip 1.5:

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Failed to run a 0.30 timer in 'GroupCrafting v1.0.2' (ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index)
  at System.ThrowHelper.ThrowArgumentOutOfRangeException (System.ExceptionArgument argument, System.ExceptionResource resource) [0x00029] in <fb001e01371b4adca20013e0ac763896>:0
  at System.ThrowHelper.ThrowArgumentOutOfRangeException () [0x00000] in <fb001e01371b4adca20013e0ac763896>:0
  at Oxide.Plugins.GroupCrafting+<UpdateOnlinePlayers>c__AnonStorey0.<>m__0 () [0x00023] in <f7291648963d407597018a5abe6b297f>:0
  at Oxide.Core.Libraries.Timer+TimerInstance.FireCallback () [0x00018] in <cf88a28c7fb44d36890d85a78331cc9d>:0

File was updated correctly:

{
  "CraftingSpeed": {
    "default": 1.0,
    "authenticated": 1.0,
    "regular": 1.0,
    "elite": 1.0,
    "legend": 1.0,
    "vip": 1.5,
    "donator": 1.0,
    "serverarmour.hardware.ownsbloody": 1.0
  }
}