For anyone looking for a solution , Problem (Root Cause) :- the below error means that you ran the jar first with a higher version of Java and now you are running it with a lower version. Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0In my case I ran the jar first with Java 11 , but my cmd picked Java 8 nowadays and I ended up with this exact error . Solution :- Stop your AEM Jar Remove your lower Java version and upgrade t...