Class file has wrong version 61.0 should be 52.0 spring July 8, 2019 16 32 64 128 Class file has wrong version 61.0 should be 52.0 spring boot _buildscript_' unsupported class file major version 63 Class file has wrong version 63.0 should be 61.0 Spring class file has wrong version 61.0 should be 52.0 Spring class file has wrong version 61.0 should be 55.0