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While we compile an android project, build an error which showed, source=[Unknown source file] and tool  name=Optional.of(D8)}

Question asked by Harshali on May 9, 2018
Latest reply on May 10, 2018 by maprcommunity, source=[Unknown source file], tool  name=Optional.of(D8)}

I have updated the supportlibraryversion to 27.1.1 and gson version to 2.8.1 but nothing worked. 


If someone can please help...