>> there is a new "IE Mode" in Edge. According to M$, it uses the IE 11
>> engine
>> for "legacy sites". Whatever this means.
>
> I tried that at first, but it does not work.
>
> Adding the site page to the IE exception list allows you to start the
> process, but then it fails (just hangs).
>
> That is why I decided to use IE11 in a Windows 10 VM.

Ouch! Thanks for the confirmation, my friend.

Friedrich