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    via Stack Overflow by ERJAN

    This exception occurs when using an older version of java. Mainly when trying to run a jar compiled with a newer Java version in an older Java version. We can avoid this issue by executing the jar in the same version which it was compiled.

Solutions on the web

via Stack Overflow by Daneel S. Yaitskov
, 1 year ago
Ooo has been compiled by a more recent version of the Java Runtime (class file version 0.0), this version of the Java Runtime only recognizes class file versions up to 52.0
via GitHub by dequis
, 2 years ago
MCPCPlusXNmsBlock_147 : Unsupported major.minor version 51.0
via Google Groups by dehrmann, 2 years ago
Empty query.