Panasonic KX-MB771G Twain error

[oe3jtb]

Using Windows 11 and Panasonic KX-MB771G
Scanner is found

perfect

When I want to scan this happens

error log
2026-01-24 13:41:06.0173 20220 Error in invoked action System.NullReferenceException: Object reference not set to an instance of an object.
at ReturnCode NTwain.Triplets.PendingXfers.EndXfer(TWPendingXfers pendingXfers)
at void NTwain.Internals.TransferLogic.DoTransferRoutine(ITwainSessionInternal session)
at void NTwain.TwainSession.HandleSourceMsg(Message msg)
at ReturnCode NTwain.TwainSession.HandleCallback(TWIdentity origin, TWIdentity destination, DataGroups dg, DataArgumentType dat, Message msg, IntPtr data)+() => { } [1]
at void NAPS2.Platform.Windows.Win32MessagePump.RunQueuedActions()

any idea pse
tnx
kr