change build environment to java 17 for server running on high version of java.The plugin content has not changed
We recommend using Java 8 or a higher version of Java
JE8 edition has been upload previously , and JE8 edition can only be used for servers running on low version of java such as spigot / paper in 1.12.2 runing on java 8.

Java Edition 8 build.
This edition can be used for server running on Java 8 environment.
Java 8 supported server versions 1.12.2-1.16.5
if your server running on Java 8 or above , support version server will up to 1.21

change the build environment to java 17 for server running on high version of java.The plugin content has not changed
We recommend using Java 8 or a higher version of Java
JE8 edition has been upload previously , and JE8 edition can only be used for servers running on low version of java such as spigot / paper in 1.12.2 runing on java 8.