Vlad C - 2018-09-05

Hello, I'm encountering the following error when starting the run.sh app:

Vlads-MacBook:~ vlad$ /Users/vlad/Downloads/meka-release-1.9.0/run.sh ; exit;\
Exception in thread "main" java.lang.NoClassDefFoundError: meka/gui/guichooser/GUIChooser\
Caused by: java.lang.ClassNotFoundException: meka.gui.guichooser.GUIChooser\
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)\
at java.security.AccessController.doPrivileged(Native Method)\
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)\
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)\
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)\
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)\
logout\
Saving session...\
...copying shared history...\
...saving history...truncating history files...\
...completed.\
Deleting expired sessions...40 completed.\
\
[Process completed]\
}

Does anyone have any idea what i'm doing wrong? Could it be that some class is missing from the downloaded meka package?