We’re aware of issues that are preventing players from joining Realms. The team is currently working to resolve these issues! -MG

I've had this issue since 1.17.1 has come out. After all of my time still paying for my realm I can't even get on it. I have installed 1.18 for the issue to only happen faster. I get about 20 seconds to play then I get the error. Everything on my PC is up to date.