java.lang.NoClassDefFoundError: org/apache/tools/ant/util/ReaderInputStream vaadin+gradle+intelliJ

Question

I have been working fine with Vaadin + Gradle + IntelliJ until yesterday night when I introduced SLF4J(logback) logging to my application. Since then I can\'t make

Answer 1

File > Invalidate Caches / Restart... option didn't work for me, but

sudo git clean -dfx worked fine