You probably know about this already, but just throwing it out there. ;)

Could you provide some details please? Without any logs or details, there isn't much to go on.

Here you go. Thanks!

NullReferenceException: Object reference not set to an instance of an object
at Oxide.Plugins.ZoneManager+Zone.OnColliderEnterZone (UnityEngine.Collider col) [0x000ca] in <390c3be9a0114800b9e7e6d0462d8a79>:0
at Oxide.Plugins.ZoneManager+Zone.OnTriggerEnter (UnityEngine.Collider col) [0x00030] in <390c3be9a0114800b9e7e6d0462d8a79>:0

Merged post

It would let me create the zone and set the radius. When I opened the flags gui and began setting flags I started getting errors.

Merged post

Oxide update seems to have fixed the issue.

Oxide updates haven't changed anything, only updated Rust.