Exceptions in running C and JAVA plugin

[RebeWu]

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/eclipse/core/runtime/CoreException has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
My jdk and jre are both 1.8.
How can I fix this ？

[osmarleandro]

Hi @RebeWu,

You can check the java -version and javac -version, and then run ./gradlew clean.

[RebeWu]

I am afraid it didn't work and I have tried lots of methods from the SO, none of them work.

[RebeWu]

By the way, the maven dependency (refinder) in refdiff-evaluation also missed in Maven Repository.