WebClient Your session ended because an unexpected server authentication certificate was received from the remote PC

Followed this:

https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/remote-desktop-web-client-admin

I definitely done:

.cer file that you copied from the RD Broker

But the complain from the webpage gives the hash of the certificate from actual RD SH to which I am connecting, NOT the Broker!

And if I

Import-RDWebClientBrokerCert <rdsh.cer
then it complains about certificate from the Broker
Madness!