LoneDev please help I am having the same issue as well but for LoneLibs: [30.03 14:05:00] [Server] [Server thread/INFO] [STDERR/]: [lonelibs.dev.lone.fastnbt.nms.nbt.NBT:<clinit>:39]: java.lang.UnsupportedClassVersionError: lonelibs/dev/lone/fastnbt/nms/nbt/CompoundTag_v1_17_R1 has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 55.0
I need to figure out which version of LoneLibs still uses Java 11. And no, Minecraft 1.16 requires Java 8 to compile, Minecraft 1.17 requires Java 16 to compile, and Minecraft 1.18+ requires Java 17.