It looks like there is an issue with the native Nd4j library, which is used by Deeplearning4j. Try uninstalling the WekaDeeplearning4j package. If the WEKA package manager crashes as well, remove the corresponding package folder manually from the packages folder that is inside the wekafiles folder (which is normally located in your home folder).
Good day Dr. Eibe Frank.
Thank you, your solution worked like magic !
I deleted the WekaDeeplearning4j package file from the packages folder in
the wekafiles folder and now the classification tab worked like it used to