Can't get into Realms.

**For the past four days, whenever I try to enter Realms, I get a message that the connection to the server has been lost.

Even if I can get in, I can only play for a few minutes, and then I get kicked out of Realms with the message "Connection with the server has been lost.

I've tried reconnecting Wi-Fi and restarting my PC, but there was no change.