The Session group has grown bigger, it's now the most active of all our rooms.

If you ask tech/privacy questions here, you'll get interesting discussion.  You go to “Join Community” and add this URL:

https://session.simplifiedprivacy.is/simplified?public_key=ed33150048005a9237708314785af91f5dfe0d9eafd8a66df6e9977cc9619431 

 I'm getting an error message that says "Couldn't join group".

Is there a QR I could try to scan instead? 

 Yes there's a QR code here:

https://simplifiedprivacy.com/sessionsubscribe/