Posted June 17, 201510 yr I keep getting the error below and I've tried everything I can think of. Yes I am entirely new to modding so pardon if it's a stupid mistake. Also if you're willing to share the knowledge how do I "import" the build.gradle into intellij directly? Exception in thread "main" java.lang.NoClassDefFoundError: com/mojang/authlib/exceptions/AuthenticationException at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:122) Caused by: java.lang.ClassNotFoundException: com.mojang.authlib.exceptions.AuthenticationException at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 3 more Java HotSpot 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release Edit: Followed this http://www.minecraftforge.net/forum/index.php/topic,21354.0.html thread and solved my issue but differently, if anyone has a solution incase run into the problem again please tell.
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