This keeps popping up in the upper right of my screen, it blocks access to anything underneath and I can't get rid of it. How do I disable this? I believe it's referring to my ECHO but who knows.
I would disable WiFi calling on my iPhone and see if that resolves this issue. Here is how to do it:
On your iPhone, go to Settings > Phone > Calls on Other Devices, then turn off Allow Calls on Other Devices.
On your Mac, open the FaceTime app, choose FaceTime > Settings (or Preferences), then deselect Calls From iPhone.
Restart the Mac if a test call to your phone still rings the Mac. See the Apple support webpage "Make and receive phone calls on Mac or iPad" for more details.