I couldn't get the shop to show in Welcome Panel, but I have "Shop" set up in addon settings for tab 4, and I have "» Use Shop as WelcomePanel Addon": true,.
Tested with Welcome Info UI 3.0.7 together with Shop 1.1.61 and 1.1.62.
Failed to call hook 'OnServerInitialized' on plugin 'Shop v1.1.62' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.Shop.SelectLayout () [0x00040] in <9c8d980a622b4868830cf6297fd5c8e7>:0
at Oxide.Plugins.Shop.OnServerInitialized () [0x00036] in <9c8d980a622b4868830cf6297fd5c8e7>:0
at Oxide.Plugins.Shop.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002b1] in <9c8d980a622b4868830cf6297fd5c8e7>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <e23ba2c0f246426296d81c842cbda3af>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0
