Reflecta super 8 scanner on pi, Windows reconnects every 5 seconds

I have installed the server: virtualhere generic arm-version (no pi at end of file) on a raspberry pi 3b raspbian
And the client on a Windows 10.
Server is found, the server lists the device correctly as webcam gadget (i had the film scanner installed locally previously).
But after some seconds the device disconnects. Some seconds later, it connects again. And keeps on reconnecting...
What can i do?

#2

I have tested now from my notebook. The reconnection problem does not exist here. How can I find out the problem on my main pc?

#3

1. Reboot your Pi
2. Try to use the super 8 on the main pc via virtualhere
3. Send me the /var/log/syslog file from the pi mail [at] virtualhere.com (mail[at]virtualhere[dot]com)