Getting this error when trying to buy heli signals,

Loaded plugin Heli Signals v1.2.24 by ZEODE
Failed to call hook 'CmdBuySignal' on plugin 'HeliSignals v1.2.24' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.HeliSignals.CmdBuySignal (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x00559] in <023cec40fe104da2b2290cfc87d66c7e>:0 
  at Oxide.Plugins.HeliSignals.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01199] in <023cec40fe104da2b2290cfc87d66c7e>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d82f1fa409f84967ab685a3dbdd116ae>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <2a1b2b9b0c9d45ea87d32bff811299cc>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <2a1b2b9b0c9d45ea87d32bff811299cc>:0 

Works fine if I leave it server rewards, but we use economics. 

Changed Status from Pending to Closed

Changed Fixed In to Next Version