server restart + update

Good day, after restarting the server and updating, the plugin doesn't want to turn on, it says that the images are loading, you can't see what could be wrong? 

Hey, maybe one of your images that you host aren't reachable anymore by shop and it takes X seconds before it times out. Check your all URLs in config if any of them are unreachable, or remove all URLs and change them to one, your own CDN

ok I'll try to check it out

[Error] Failed to call hook 'OnPlayerLootEnd' on plugin 'ShoppyStock v2.1.6' (KeyNotFoundException: The given key '' was not present in the dictionary.)
  at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <e605204d165a49d89ae7579f3d894429>:0 
  at Oxide.Plugins.ShoppyStock.OpenShopUI (BasePlayer player, System.Boolean forceUpdate) [0x00276] in <0fd17b4c1c374908ab3d3e625af86b52>:0 
  at Oxide.Plugins.ShoppyStock.OpenSavedUI (BasePlayer player) [0x00026] in <0fd17b4c1c374908ab3d3e625af86b52>:0 
  at Oxide.Plugins.ShoppyStock.OnPlayerLootEnd (PlayerLoot loot) [0x00186] in <0fd17b4c1c374908ab3d3e625af86b52>:0 
  at Oxide.Plugins.ShoppyStock.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001aa] in <0fd17b4c1c374908ab3d3e625af86b52>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <15f61ddda771464d8246ebdce8ff4811>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <15f61ddda771464d8246ebdce8ff4811>:0 
 

Hard to say from this error what happened, can you replicate it somehow or it was one-time thing?

I have no idea at all; I'll try to observe it.