How Does Vpn Client Affect Miracast?

I am on a Dell laptop, that came stock w Win 10, and my miracast is broken. (It worked since the beginning, then broke one day.)

I initially thought (per How to troubleshoot miracast on windows 10 laptop? ) that a windows update caused the issue. I now think the installation of the Sonicwall VPN Netextender client caused the problem. (And, fwiw, I have both Sonicwall Netextender AND Cisco Anyconnect vpn clients, I use them both. I had anyconnect for some months with no miracast problem, but when I put on Netextender....)

There are documented conflicts between Miracast and some vpn clients ( and other threads)

But I have tried uninstalling Netextender and rebooting, and miracast did not come back to life (and I need Netextender!).

How do I:

a) Get logging data out of miracast on the laptop to help diag the issue?

or

b) "Walk" the networking stack to (hopefully) identify what is messing w Miracast

or

c) ___ ?

UPDATE

I found a solution to the problem here: