#Launch4J Executable launch error

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haughty drift
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I have tried to make a Windows executable using Launch4J but I always get an error in return.

Error: LinkageError occurred while loading main class Main
        java.lang.UnsupportedClassVersionError: Main has been compiled by a more recent version of the Java Runtime (class file version 63.0), this version of the Java Runtime only recognizes class file versions up to 55.0
vast flaxBOT
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