I'm not 100% sure it's because of Ars, but whenever I'm by the server's spawn or my farm, Java crashes. Not Minecraft, the Java runtime enviroment. In the log, i see this right before the stuff about ...

NOTE: Running 1.16.5 with Java versions newer than 8 is only possible with ModernFix' JVM arguments. Not all mods may work though, so if you find an incompatible one, switch back to Java 8.

Minecraft 1.21 has finally been released, and while it’s a great update with plenty of fun adventures in store, it’s not going to stop us from speculating on what the next one might look like.