Failed to call hook 'OnEntityTakeDamage' on plugin 'NoEscape v2.1.24' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.NoEscape.CreateRaidZone (UnityEngine.Vector3 position) [0x000c9] in <6d281064ef8b46879361dc67b692f858>:0
  at Oxide.Plugins.NoEscape.StartRaidBlocking (BasePlayer target, UnityEngine.Vector3 position, System.Boolean createZone) [0x000ec] in <6d281064ef8b46879361dc67b692f858>:0
  at Oxide.Plugins.NoEscape.BlockAll (BasePlayer source, BaseEntity targetEntity, System.Collections.Generic.List`1[T] sourceMembers) [0x00025] in <6d281064ef8b46879361dc67b692f858>:0
  at Oxide.Plugins.NoEscape.StructureAttack (BaseEntity targetEntity, BaseEntity sourceEntity, System.String weapon, UnityEngine.Vector3 hitPosition) [0x000a0] in <6d281064ef8b46879361dc67b692f858>:0
  at Oxide.Plugins.NoEscape.OnEntityTakeDamage (BaseCombatEntity entity, HitInfo hitInfo) [0x000d1] in <6d281064ef8b46879361dc67b692f858>:0
  at Oxide.Plugins.NoEscape.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00e28] in <6d281064ef8b46879361dc67b692f858>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <98321e516fc1420ea57d4d2088213a59>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in :0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in :0

Any ideas why this has started appearing alot?

Failed to call hook 'OnEntityDeath' on plugin 'NoEscape v2.1.25' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.NoEscape.CreateRaidZone (UnityEngine.Vector3 position) [0x000c9] in <ab6934935df248fcbf9fb1de2e9a0128>:0
at Oxide.Plugins.NoEscape.StartRaidBlocking (BasePlayer target, UnityEngine.Vector3 position, System.Boolean createZone) [0x000ec] in <ab6934935df248fcbf9fb1de2e9a0128>:0
at Oxide.Plugins.NoEscape.BlockAll (BasePlayer source, BaseEntity targetEntity, System.Collections.Generic.List`1[T] sourceMembers) [0x00025] in <ab6934935df248fcbf9fb1de2e9a0128>:0
at Oxide.Plugins.NoEscape.StructureAttack (BaseEntity targetEntity, BaseEntity sourceEntity, System.String weapon, UnityEngine.Vector3 hitPosition) [0x000a0] in <ab6934935df248fcbf9fb1de2e9a0128>:0
at Oxide.Plugins.NoEscape.OnEntityDeath (BaseCombatEntity entity, HitInfo hitInfo) [0x00077] in <ab6934935df248fcbf9fb1de2e9a0128>:0
at Oxide.Plugins.NoEscape.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00e5e] in <ab6934935df248fcbf9fb1de2e9a0128>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d09a1f46ca2f4432811bcfe45ad13c7b>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cf88a28c7fb44d36890d85a78331cc9d>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cf88a28c7fb44d36890d85a78331cc9d>:0