NRE Since Forced wipe

Getting this error everytime someone tries to open the UI
 

(00:19:03) | Failed to call hook 'CmdOpenUi' on plugin 'Referrals v1.3.1' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.Referrals.MainUi (BasePlayer player, System.Int32 page, System.Int32 rPage, System.Boolean first) [0x00fe4] in <8c3106ee2aca45cbb9f99099f7650af0>:0 
  at Oxide.Plugins.Referrals.CmdOpenUi (Oxide.Core.Libraries.Covalence.IPlayer cov, System.String command, System.String[] args) [0x00080] in <8c3106ee2aca45cbb9f99099f7650af0>:0 
  at Oxide.Plugins.Referrals.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0096f] in <8c3106ee2aca45cbb9f99099f7650af0>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <cd9a02fd331347bd82d550bb1a9c8e9f>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <b76ec77c47d1449e92b2baab8603843d>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <b76ec77c47d1449e92b2baab8603843d>:0

Hi! 

do you have ImageLibrary installed?If yes, it is installed - send me your config please