What's with the new sudden unannounced changes?

I have been a paid user for several years. Earlier this week or so, the macos app updated for me and is showing a completely different interface. When I click on the 'Overview" button, I am shown the following error:

but other features seem to be working.

What is RT X? When was all of this change announced?

And for the life of me, I can’t figure out why my slack status each evening changes to:

Screen Shot 2022-03-17 at 8.36.55 PM

where is the setting to control/configure this? I did not set this up.

This is all unexpected and quite frustrating.