Not working after purchasing

Hello, just bought this and it doesn't work:

  "EntityName": " **Cargo Ship**",
  "EntityPosition": null
Exception while calling NextTick callback (NullReferenceException: )
  at (wrapper managed-to-native) UnityEngine.Component.get_gameObject(UnityEngine.Component)
  at UnityEngine.Component.GetComponentInParent (System.Type t, System.Boolean includeInactive) [0x00001] in <5f55adde392a4f559fa097c2225879c0>:0                                                                         16kb/s in, 99kb/s out
  at UnityEngine.Component.GetComponentInParent[T] () [0x00001] in <5f55adde392a4f559fa097c2225879c0>:0
  at Oxide.Plugins.MonumentAddons.HasRigidBody (BaseEntity entity) [0x00000] in <87c8fc9b96f6423e922e68113acb3b2b>:0
  at Oxide.Plugins.MonumentAddons+DynamicMonument.FromEntity (BaseEntity entity) [0x00000] in <87c8fc9b96f6423e922e68113acb3b2b>:0
  at Oxide.Plugins.MonumentAddons+<>c__DisplayClass51_0.<OnEntitySpawned>b__0 () [0x0001d] in <87c8fc9b96f6423e922e68113acb3b2b>:0

Changed Status from Pending to Not a Bug

As you can read in the error message, this error is caused by monument addons