Go on Google Meet, create an instant meeting and get in.
A message pops out in the bottom left saying “Something went wrong and your background can’t be blurred.”
The button for background blur is gone also.
Version 1.18.70 Chromium: 87.0.4280.101 (Official Build) (64-bit)
It used to work. I tested on Chrome and it works. On Brave it doesn’t work. Waited for an update to see if its fixed. After launching with Version 1.18.70 it still doesn’t work.
Apparently Google has introduced “non std features” into its websites to break Google sites for any browser except for Google Chrome.
Nothing that can be done about Google locking you into Chrome for Google sites…