A window keeps popping up, Adobe flash player, an action script error has occured,

This is the information contained within,
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
      at flash.display::DisplayObjectContainer/removeChild()
      at tv.reelfeed.vpaid::VPAIDFramework/cleanup()[/Users/adriancook/IntelliJProjects/VPAIDFramework/src/tv/reelfeed/vpaid/VPAIDFramework.as:840]
      at tv.reelfeed.vpaid::VPAIDFramework/cancelCurrentAd()[/Users/adriancook/IntelliJProjects/VPAIDFramework/src/tv/reelfeed/vpaid/VPAIDFramework.as:790]
      at tv.reelfeed.vpaid::VPAIDFramework/onAdStopped()[/Users/adriancook/IntelliJProjects/VPAIDFramework/src/tv/reelfeed/vpaid/VPAIDFramework.as:818]
      at flash.events::EventDispatcher/dispatchEventFunction()
      at flash.events::EventDispatcher/dispatchEvent()
      at com.liverail.app::AdManagerVPAIDApp/dispatchVPAIDEvent()
      at com.liverail.app::AdManagerVPAIDApp/sendAdStoppedEvent()
      at com.liverail.app::AdManagerVPAIDApp/stopAd()
      at tv.reelfeed.vpaid::VPAIDWrapper/stopAd()[/Users/adriancook/IntelliJProjects/VPAIDFramework/src/tv/reelfeed/vpaid/VPAIDWrapper.as:276]
      at tv.reelfeed.vpaid::VPAIDFramework/stopAd()[/Users/adriancook/IntelliJProjects/VPAIDFramework/src/tv/reelfeed/vpaid/VPAIDFramework.as:1746]
      at com.liverail.view.adapters.vpaid::VPAIDWrapper/stopAd()
      at com.liverail.view.adapters.vpaid::VPAIDDisplay/destroy()
      at com.liverail.view.adapters.vpaid::VPAIDAdapter/onAdDisplayDestroy()
      at com.liverail.view.adapters.vpaid::VPAIDAdapter/destroy()
      at com.liverail.managers::AdapterManager/destroy()
      at com.liverail.managers::AdModelV2/destroy()
      at com.liverail.app::AdManagerApp/destroy()
      at com.liverail.app::AdManagerVPAIDApp/stopAd()
      at VPAIDPlayer/stopAd()
      at Function/http://adobe.com/AS3/2006/builtin::apply()
      at flash.external::ExternalInterface$/_callIn()
      at Function/<anonymous>()