:mybatis:jar:${mybatis.version}: Failed to read artifact descriptor for org.mybatis:mybatis:jar:${mybatis.version}: Could not
transfer artifact org.mybatis:mybatis:pom:${mybatis.version} from/to nexus (http://
/gradlew mbGenerator)时,出现了一个错误,并显示"Cannot instantiate the object of type com.example.demo.plugin.MyCustomPlugin-- My Custom Plugin -->在下面的generatorConfig.xml:mybatis-spring-boot-star