Mojang Studios announced Tuesday it will eliminate code obfuscation in Minecraft: Java Edition, marking a significant shift in how the company distributes the game to its modding community.

Unsupported class file major version 69 - Server is running with Java 25... #3566 New issue Closed TerdyTheTerd ...

Extracting the serial.jar file manually from the portable version's zip file of 4.4.7 can solve this problem, but I still hope the official can fix it as soon as ...