Minecraft Scoreboard Plugin buggt?

Ce
- in Plugins
2

I just programmed a plugin a scoreboard plugin what buggt:

https://hastebin.com/...ilupit.sql

Ce

GUCK the Hastebin on there's the ERROR and no CODE

cl

Are you aware that I do not get much from a stack race? I'll just googling the bug, but I can just read, because it says that the class or the plugin is invalid, but you'll have seen for yourself.
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError

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