export video error

I use dell nb, cpu: i7 ram:16G


App: VIRB Edit
At: 2018/7/31 ?? 09:18:42 (UTC8)
OS: Windows 8 (64-bit)
Processor: x64, Processor Level: 6, Processors:4, Model: 142 Stepping: 10, RAM: 16655188
VIRBEXPORT.EXPORTER_T.<EXPORT>D__1.MOVENEXT-555-5.4.2.0
NullReferenceException
??????????????????
? VirbExport.Exporter_t.<Export>d__1.MoveNext() ? D:\jenkins\workspace\PND-Rel-VIRBEdit-Win-Install\win\apps\VirbEdit\VirbExport\Exporter.cs: ? 41
--- ??????????????????? ---
? System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
? System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
? VirbExport.VirbExportApp.<HandleStartup>d__1.MoveNext() ? D:\jenkins\workspace\PND-Rel-VIRBEdit-Win-Install\win\apps\VirbEdit\VirbExport\Export.cs: ? 73
--- ??????????????????? ---
? System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
? System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
? System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
.NET Versions:
.NET FW 1.0 not installed.
.NET FW 1.1 not installed.
.NET FW 2.0 with SP2 installed
.NET FW 3.0 with SP2 installed
.NET FW 3.5 with SP1 installed




Attached File: MiniDump