Error message when picking up hemp

As soon as I want to record hemp, this error message comes up. 
I also get only fabric and seeds


Failed to call hook 'OnCollectiblePickup' on plugin 'Ganja v2.0.1' (InvalidCastException: Null object cannot be converted to a value type.)

Failed to call hook 'OnCollectiblePickup' on plugin 'Ganja v2.0.1' (InvalidCastException: Null object cannot be converted to a value type.)

Failed to call hook 'OnCollectiblePickup' on plugin 'Ganja v2.0.1' (InvalidCastException: Null object cannot be converted to a value type.)

at System.Convert.ChangeType (System.Object value, System.Type conversionType, System.IFormatProvider provider) [0x00029] in <fb001e01371b4adca20013e0ac763896>:0

at System.Convert.ChangeType (System.Object value, System.Type conversionType) [0x0000c] in <fb001e01371b4adca20013e0ac763896>:0

at Oxide.Core.Plugins.Plugin.Call[T] (System.String hook, System.Object[] args) [0x00008] in <157a94ee66ab4a7991faecd1eb84be3b>:0

at Oxide.Plugins.Ganja.IsDeployableNature (BaseEntity entity) [0x00011] in <8ceaae58f4fc4b09bb23b40f628c1acc>:0

at Oxide.Plugins.Ganja.OnCollectiblePickup (CollectibleEntity entity, BasePlayer player) [0x00029] in <8ceaae58f4fc4b09bb23b40f628c1acc>:0

at Oxide.Plugins.Ganja.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x005df] in <8ceaae58f4fc4b09bb23b40f628c1acc>:0

at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <ccbecb1690ac40048b5b01f4ad263c1c>:0

at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <157a94ee66ab4a7991faecd1eb84be3b>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <157a94ee66ab4a7991faecd1eb84be3b>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <157a94ee66ab4a7991faecd1eb84be3b>:0

I fixed this issue with the latest update

Changed Status from Pending to Closed