Installed forge now minecraft won't open

[gman33]

the crash:

 

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/logging/log4j/Level

at net.minecraft.launchwrapper.Launch.launch(Launch.java:94)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.Level

at java.net.URLClassLoader$1.run(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

... 2 more

 

the version is 1.8.

thank you very much!

[gman33]

well.. is there anything i can do?

[gman33]

how can i check that?

[gman33]

Its from teamextreme

 

http://postimg.org/image/g592zi0id/