SpigotCore_Main/src/de/steamwar/authlib/AuthlibInjector.java

@@ -28,9 +28,10 @@ import java.lang.reflect.Field;
 public class AuthlibInjector {
 
     public static void inject() {
-        if(Core.getVersion() < 15) {
+        if(Core.getVersion() != 15) {
             return;
         }
+
         try {
             Class<?> minecraftServerClass = VersionedCallable.call(new VersionedCallable<>(() -> AuthlibInjector_15.getMinecraftClass(), 15));
             Field repo = minecraftServerClass.getDeclaredField("gameProfileRepository");