Like others, I was having issues with Realms where the server would go down for a time and all players would be unable to connect. I resolved it twice temporarily by closing the Realm and reopening it. It usually took about ten minutes for the loading screen to finish each time before I could then open my Realm. It opened instantly both times and we got a few hours of active time with each. The third time it remained on the loading screen for an hour before I gave up and hit cancel. When I closed Minecraft and the launcher and restarted them, then tried to connect to the Realm, it gave me the message:

"World is in operation Close since: 2018-08-20t00:21:25.465Z (PT25H10M28.2835) - 50"

The ends are cut off on my screen and I could not copy the text, but I believe the end is a 500 error.

If I try to close the realm, it gives the progress screen forever. Same with changing worlds. I have no crash log to upload as there was no crash, only the error message.