Topic category: Troubleshooting, bugs, and solutions
Ubuntu
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.1 LTS"
openjdk version "10.0.2" 2018-07-17
OpenJDK Runtime Environment (build 10.0.2+13-Ubuntu-1ubuntu0.18.04.4)
frank@luke:~/Desktop/MCreator 1.7.3 [1.7.10] Mac-Linux 32-64bit(1)$ java -jar MCreator.jar
[Tue Jan 08 11:42:39 GMT 2019] - Exception in thread "main" [Tue Jan 08 11:42:39 GMT 2019] - java.lang.ClassCastException: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader
[Tue Jan 08 11:42:39 GMT 2019] - at co.pylo.a.c.a.a(Unknown Source)
[Tue Jan 08 11:42:39 GMT 2019] - at co.pylo.a.c.a.a(Unknown Source)
[Tue Jan 08 11:42:39 GMT 2019] - at co.pylo.mcreator.Launcher.a(Unknown Source)
[Tue Jan 08 11:42:39 GMT 2019] - at co.pylo.mcreator.Launcher.main(Unknown Source)
You are using Java 10, but MCreator needs Java 8 to run. Check: https://mcreator.net/install/linux