I'm seeing the same error messages as the ones shown in the screenshots above, on MacOS 10.15.6, since September 19. Can't switch worlds (I get the 500 error "read timed out" shown in Tom Gaffney's comment above), have also tried all suggestions on the official Realms Java Edition connection issues helpdoc. I was actually able to log back in yesterday and thought it was fixed (as Michael Matthews noted above) but the errors are recurring today. So the connection issue appears to be happening inconsistently.
Wendy Cholbi
I'm seeing the same error messages as the ones shown in the screenshots above, on MacOS 10.15.6, since September 19. Can't switch worlds (I get the 500 error "read timed out" shown in Tom Gaffney's comment above), have also tried all suggestions on the official Realms Java Edition connection issues helpdoc. I was actually able to log back in yesterday and thought it was fixed (as Michael Matthews noted above) but the errors are recurring today. So the connection issue appears to be happening inconsistently.