ช่วยบอกวิธีแก้ไขAdobe Flash Player An ActionScript error has occurred

Adobe Flash Player   
An ActionScript error has occurred

TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at com.pubmatic.video.vpaid:MVpaidPlayer/checkVpaidProperty()
    at com.pubmatic.video.vpaid:MVpaidPlayer/stop()
    at com.pubmatic.video.vpaid::VPAIDMain/stopAd()
    at org.openvideoads.vast.overlay::VPAIDWrapper/stopAd()
    at org.vpaidjs::VPAIDJSPlayer/jsStopAd()
    at Function/http://adobe.com/AS3/2006/builtin::apply()
    at flash.external::ExternalInterface$/_callIn()
    at Function/<anonymous>)
    at flash.external::ExternalInterface$/_evalJS()
    at flash.external::ExternalInterface$/call()
    at org.openvideoads.vast::VASTController/fireAPICall()
    at Function/OverlayController.as$3:anonymous()
    at org.openvideoads.vast.model::VPAIDMediaFile/callbackOnComplete()
    at org.openvideoads.vast.model::VPAIDMediaFile/onVPAIDAdStopped()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at com.pubmatic.video.vpaid::VPAIDMain/dispatchAdEvent()
    at com.pubmatic.video.vpaid:MVpaidPlayer/tpAdStoppedHandler()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at com.google.ads.ima.vpaid::Vpaid1AdSdk/eventHandler()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at MethodInfo-406()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at com.google.ads.ima.formats.common::AdsManagerImpl/dispatchEvent()
    at com.google.ads.ima.common:eferredEventDispatcher/dispatchAllDeferredEvents()
    at com.google.ads.ima.formats.common::AdsManagerImpl/adEventHandler()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at com.google.ads.ima.formats.common.video::VideoAdImpl/adCompleteHandler()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at com.google.ads.ima.formats.vast.ui::AbstractVideoAdRenderer/redispatchHandler()
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at com.google.ads.ima.formats.common.video::NetStreamEventsSource/handleVideoComplete()
    at com.google.ads.ima.formats.common.video::NetStreamEventsSource/playStatusHandler()
    at Function/http://adobe.com/AS3/2006/builtin::apply()
    at com.google.ads.ima.formats.common.video::NetStreamCallbacksMasterClient/callbackHandler()
    at Function/http://adobe.com/AS3/2006/builtin::apply()
    at MethodInfo-4349()

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