win10-x64 lo 7.0.3.1 x64 installation of OOod-Chart Digitizer 1.2.1 broken An extension manager Window shows java.lang.reflect.InvocationTargetException win10-x64 lo 7.0.2.2 x64 is without problem. actual java 8 patch271 installed in both extension see https://extensions.libreoffice.org/en/extensions/show/digitizer-of-xy-chart
same error java.lang.reflect.InvocationTargetException in LO 6.4.7.2 x64 at win10-x64
win10-x64 LO 7.0.2.2 x64 is with same problem. After reinstall same window java.lang.reflect.InvocationTargetException
for repair of this important extension source available at https://extensions.libreoffice.org/assets/downloads/z/ooodproj-1-2-1-source.zip
you should write to extension author instead