Geogebra doesn't start on Ubuntu 18.04

Hi :)

I've addressed your question to the Team, since I'm not an Ubuntu user and currently no one here was able to help.

Hi,

- uninstall the geogebra package : it is the old 4.2 version on Ubuntu

and/or

- load/install the GeoGebra classic 5 named geogebra5 : download from : https://www.geogebra.org/download

- load/install the GeoGebra classic 6 named geogebra-classic: download from : https://www.geogebra.org/download

both work at home with Ubuntu 18.04 64 bit

Thanks a lot for the answers! :-)

I know geogebra installed with

sudo apt-get install geogebra

is a old version, but I like it more than the newer ones.

I will try GeoGebra classic 6. Anyway I'd like, if possible, to have news about this problem.

Geogebra installed on Ubuntu 18.04 Bionic is version 4.0.34. It starts with the following output in the Terminal, immediately exiting afterwards:

$ geogebra 
GeoGebra 4.0.34.0 (Debian version 4.0.34.0+dfsg1-4) 22 June 2012 Java 10.0.2
*** Message from [geogebra.main.Application.setUpLogging]
	/tmp/GeoGebraLog_evysubeckj.txt

The logfile mentioned by the terminal output shows the following exception:

java.lang.ClassCastException: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader
        at geogebra.plugin.ClassPathManipulator.addURL(ClassPathManipulator.java:68)
        at geogebra.plugin.PluginManager.<init>(PluginManager.java:80)
        at geogebra.main.Application.getPluginManager(Application.java:5048)
        at geogebra.main.Application.<init>(Application.java:612)
        at geogebra.main.Application.<init>(Application.java:467)
        at geogebra.gui.app.GeoGebraFrame.createApplication(GeoGebraFrame.java:288)
        at geogebra.gui.app.GeoGebraFrame.createNewWindow(GeoGebraFrame.java:311)
        at geogebra.gui.app.GeoGebraFrame.createNewWindow(GeoGebraFrame.java:276)
        at geogebra.gui.app.GeoGebraFrame.init(GeoGebraFrame.java:242)
        at geogebra.gui.app.GeoGebraFrame.main(GeoGebraFrame.java:196)
        at geogebra.GeoGebra.startGeoGebra(GeoGebra.java:103)
        at geogebra.GeoGebra.main(GeoGebra.java:88)

Would be nice if the installer could be updated.