Error connecting to realm

Was able to connect earlier to the realm, but cannot seem to connect anymore. Attached screenshot shows the exact error message, albeit not very descriptive.

 

I am not using any kind of mods, shaders, or texture packs. Just a plain vanilla Minecraft client. Running latest 1.15.2. Any other helpful things I can upload as well, but I don't see any kind of connectivity log that would be useful in my %appdata%\.minecraft\logs folder.