Error

Failed to call hook 'OpenStorage' on plugin 'InstancedContainers v1.0.10' (OverflowException: Value was either too large or too small for a UInt32.)

at System.Number.ThrowOverflowOrFormatException (System.Boolean overflow, System.String overflowResourceKey) [0x0001a] in <e3aa8db986d7457ca73f10110f1283f5>:0

at System.Number.ParseUInt32 (System.ReadOnlySpan`1[T] value, System.Globalization.NumberStyles styles, System.Globalization.NumberFormatInfo info) [0x00018] in <e3aa8db986d7457ca73f10110f1283f5>:0

at System.UInt32.Parse (System.String s, System.IFormatProvider provider) [0x00017] in <e3aa8db986d7457ca73f10110f1283f5>:0

at System.Convert.ToUInt32 (System.String value) [0x0000b] in <e3aa8db986d7457ca73f10110f1283f5>:0

at Oxide.Plugins.InstancedContainers.OpenStorage (ConsoleSystem+Arg arg) [0x000b5] in <1dd1694e31a540908b786e8b7debe901>:0

at Oxide.Plugins.InstancedContainers.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00c93] in <1dd1694e31a540908b786e8b7debe901>:0

at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d6c86c8d80194fdcb3c8f9ef51229cb4>:0

at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cd7231f30b444d86bc6cca8a53cdd2ea>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cd7231f30b444d86bc6cca8a53cdd2ea>:0

Check the item amounts in the data file and see if any of them are in the negatives.

in general, I deleted everything related to the plugin, reinstalled it and tried to improve 1 mailbox, and immediately the error was the same and the mailbox did not improve.

Can hosting or other plugins block any hooks from the plugin? Although everything worked fine before that.

Same problem. Also, no new data files are being created when I place down a new chest. I can create additional instances but they aren't accessible when I click them and only the main "M" chest is available.

I also see the following in the console when trying to use InstancedContainers:-

30/04 08:37:47 | Failed to call hook 'OpenStorage' on plugin 'InstancedContainers v1.0.10' (OverflowException: Value was either too large or too small for a UInt32.)
at System.Number.ThrowOverflowOrFormatException (System.Boolean overflow, System.String overflowResourceKey) [0x0001a] in <694551e795764b938030a3128fac2b36>:0
at System.Number.ParseUInt32 (System.ReadOnlySpan`1[T] value, System.Globalization.NumberStyles styles, System.Globalization.NumberFormatInfo info) [0x00018] in <694551e795764b938030a3128fac2b36>:0
at System.UInt32.Parse (System.String s, System.IFormatProvider provider) [0x00017] in <694551e795764b938030a3128fac2b36>:0
at System.Convert.ToUInt32 (System.String value) [0x0000b] in <694551e795764b938030a3128fac2b36>:0
at Oxide.Plugins.InstancedContainers.OpenStorage (ConsoleSystem+Arg arg) [0x000b5] in <2c20e1c8eaf549ec9945e948da175642>:0
at Oxide.Plugins.InstancedContainers.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00c93] in <2c20e1c8eaf549ec9945e948da175642>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <87ce9ac9776a48658bc55eae6debe38b>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cd7231f30b444d86bc6cca8a53cdd2ea>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cd7231f30b444d86bc6cca8a53cdd2ea>:0

Can't see the issue based on the error. Would need to give you a modified version of the plugin to debug it.

Yep I'm fine with that. 

It's still a problem. I'm not quite sure how this has happened though as it wasn't working at all.:-

Stefan93 — Today at 14:08
On clan server the extra storage that you can add to each box disappeared. Half my loot was in it 

I'm going to remove it.

EDIT: So before I remove it, I thought I'd move the plugin to another folder, then rename the /data/ folder and the config, then move the plugin back again as a "just-in-case".

Failed to call hook 'AddStorage' on plugin 'InstancedContainers v1.0.10' (OverflowException: Value was either too large or too small for a UInt32.)
at System.Number.ThrowOverflowOrFormatException (System.Boolean overflow, System.String overflowResourceKey) [0x0001a] in <b11ba2a8fbf24f219f7cc98532a11304>:0
at System.Number.ParseUInt32 (System.ReadOnlySpan`1[T] value, System.Globalization.NumberStyles styles, System.Globalization.NumberFormatInfo info) [0x00018] in <b11ba2a8fbf24f219f7cc98532a11304>:0
at System.UInt32.Parse (System.String s, System.IFormatProvider provider) [0x00017] in <b11ba2a8fbf24f219f7cc98532a11304>:0
at System.Convert.ToUInt32 (System.String value) [0x0000b] in <b11ba2a8fbf24f219f7cc98532a11304>:0
at Oxide.Plugins.InstancedContainers.AddStorage (ConsoleSystem+Arg arg) [0x000b0] in <8f3fd1e846df459eac838562e30f84f3>:0
at Oxide.Plugins.InstancedContainers.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01053] in <8f3fd1e846df459eac838562e30f84f3>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <795304323ac74a298b8ed190a1dfa739>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <beb2b64691c64e2b95b99491bd85442c>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0

As you can see, it's still not working.

Message me on discord and I will throw you a copy to test.