NullReferenceException at Zone.CheckLightsError
Getting massive red errors of NullReferenceException: Object reference not set to an instance of an object

Log file:
NullReferenceException: Object reference not set to an instance of an object
at Oxide.Plugins.ZoneManager+Zone.CheckLights () [0x00016] in <5173128775c94eb796f7f539beeb46ec>:0
at InvokeHandler.DoTick () [0x000bd] in <c4828d186c484db7a0599f530f5a477d>:0
at InvokeHandler.LateUpdate () [0x0000c] in <c4828d186c484db7a0599f530f5a477d>:0​
I have this error flooding the console:
Oxide.Plugins.ZoneManager+Zone.OnTriggerEnter (UnityEngine.Collider col) (at <25ff00c4a408417db0ec512c3f78a839>:0)
NullReferenceException: Object reference not set to an instance of an object
Oxide.Plugins.ZoneManager+Zone.OnTriggerEnter (UnityEngine.Collider col) (at <25ff00c4a408417db0ec512c3f78a839>:0)
NullReferenceException: Object reference not set to an instance of an object
Oxide.Plugins.ZoneManager+Zone.OnTriggerEnter (UnityEngine.Collider col) (at <25ff00c4a408417db0ec512c3f78a839>:0)​