java.lang.UnsupportedClassVersionError: org/webjars/WebJarExtractor$Cache : Unsupported major.minor version 51.0

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    Root Cause Analysis

    1. java.lang.UnsupportedClassVersionError

      org/webjars/WebJarExtractor$Cache : Unsupported major.minor version 51.0

      at java.lang.Classloader.defineClass1()
    2. Java RT
      Classloader.defineClass1
      1. java.lang.Classloader.defineClass1(Native Method)
      1 frame