Issue trying to start application under Tomcat

[momrpg]

I've installed tomcat 7 and 8, java 7 and 8, and still can't get things working.
Error indicates:
30-Nov-2018 08:07:00.320 INFO [http-nio-8080-exec-5] org.apache.catalina.core.ApplicationContext.log HTMLManager: start: Starting web application '/zy'
30-Nov-2018 08:07:01.230 SEVERE [http-nio-8080-exec-5] org.apache.catalina.core.StandardContext.listenerStart Error configuring application listener of class net.socialgamer.cah.StartupUtils
java.lang.UnsupportedClassVersionError: net/socialgamer/cah/StartupUtils : Unsupported major.minor version 52.0 (unable to load class net.socialgamer.cah.StartupUtils)
at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2476)
(truncated for brevity)

I'm running Debian. Anyone have any ideas? I'd really like to get this going.

[ajanata]

Sounds like you're compiling with Java 8 and trying to run with Java 7 (or older). I'd make sure your JRE matches your JDK (and strongly recommend using at least Java 8 these days, if not newer).