Skype For Business Web App Will Not Install and Will Not Run in Any Browser after latest Safari update

Hey Eric, just following up on this look what I came up with (looks like my pictures are not pasting in, so apologies for that):

Skype for Business Web App for Mac OSX(black screen workaround)

Download and install Skype meetings app: (this part you will need to find on your own, a google search produced several results.
But it needs to be the Skype meetings app, not the Skype For Business app.) I used this link: https://www.jamf.com/jamf-nation/third-party-products/617/skype-meetings-app

Open Skype meetings app and paste skype meeting link into the app:

Click Open, and it will bring up Skype for Business Web App (possible with pop-up as in the picture bellow, on which you would hit Cancel)

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If Skype for Business Web app plug in is not already installed , you will see familiar screen from which you will need to download it and install it before joining/jumping in the meeting

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Click “Join Using Skype for Business Web App instead” link

Enter your name and click “Join the meeting” button

On a plugin pop-up windows , click “Allow”

You should see presenter screen (and audio should work as well).

If you experience sound issues, verify settings within app (that your sound input/output settings are correct):

Click on 3 dots at the bottom right corner and choose “Meeting Options”

Click on “Audio device” link on the left side, and verify that sound I/O is set correctly:

FYI: When you first join a meeting, your Microphone and webcam will be off.

Hello again Eric, unfortunately - two different machines (one personal one corporate), 4 different accounts and Safe Mode did not help either. I have 12 team members that are experiencing the same thing and we all experienced this after the most recent upgrade to Safari. Apple support has said that they will not support the Skype for Business Web App in Safari any longer and that Microsoft would need to write a new app for this. The unfortunate thing is that it seems this Safari update kills the ability to use the Skype for Business web app in every other browser as well which doesn't really makes sense.

Hi Eric! Thank you for taking the time to jump in here. One thing I did not mention was that other browsers are allowing me to launch the Skype for Business Web App, but the problem I run into then is that I get a blank screen when someone is sharing their desktop, and there is also no audio, causing me to have to dial into the actual call as well. I did confirm this with Opera, Firefox and Chrome and will check with SeaMonkey and Waterfox as well, but have a low confidence level at this point.

Thank you again!!

And that doesn't appear to be, my work machine is on HighSierra but my home machine is Mojave. Again, I thank you for your time in trying to assist with this.