The issue is because of Java version mismatch.The error regarding the unsupported major.minor version is because during compile time one is using a higher JDK and a lower JDK during runtime.
Thus, the 'major.minor version 52.0' error is possibly because the jar is compiled in jdk 1.8, but one is trying to run it in jdk 1.7 or 1.6 environment.
To resolve this issue, download JDK 1.8 and try to run the runAjobCli utility.
Where i can dowlonad the runAjobCli utility.
you can create a shipping ticket or use the chat option to get runajob utility
Login to Network Site and Navigate to Communities --> Cloud Integration --> Cloud data integration -->Cloud Support home (at the top)--> scroll down to the bottom of the page and click on chat option at the bottom