New issue Closed as not planned Closed as not planned [MANTRUN-220] java.lang.UnsupportedClassVersionError: Bad version number in .class file #195 Assignees Labels priority:majorMajor loss of function ...

You're using Java 8 which is no longer supported the build you're using needs Java 17+ or higher and the latest build needs Java 11+. So you have to update your Java and might need to use the latest ...