I tested the epubcheck 5 on debian linux.
Instead of testing the book I only got this message:

~/ePub/epubcheck/epubcheck-5.0.0.jar *.epub
Exception in thread "main" java.lang.NoClassDefFoundError: io/mola/galimatias/GalimatiasParseException
at com.adobe.epubcheck.tool.Checker.main(Checker.java:30)
Caused by: java.lang.ClassNotFoundException: io.mola.galimatias.GalimatiasParseException
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 1 more