[Solved]-Cannot add Module to Java EE Enterprise Application - nullPointer when creating Enterprise Application Project-eclipse

root cause is that the wtp project configuration fails due to the wrong java web facet being installed.

you could try to determine if the ear project has deployment descriptor, if so, then force save.

    final referencedcomponent ref = addcomponenttoenterpriseapplicationop.findreferencedcomponent(earwc, wc, se, compse);