23:31:35 [WARNING] Exception encountered when loading plugin: AbstractAuth
java.lang.LinkageError: loader constraint violation: when resolving method "org.slf4j.impl.StaticLoggerBinder.getLoggerFactory()Lorg/slf4j/ILoggerFactory;" the class loader (instance of net/md_5/bungee/api/plugin/PluginClassloader) of the current class, org/slf4j/LoggerFactory, and the class loader (instance of net/md_5/bungee/api/plugin/PluginClassloader) for the method's defining class, org/slf4j/impl/StaticLoggerBinder, have different Class objects for the type org/slf4j/ILoggerFactory used in the signature
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:418)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)
    at ru.abstractcoder.abstractauth.benio.config.AbstractConfig.<clinit>(AbstractConfig.java:16)
    at ru.abstractcoder.abstractauth.AbstractAuthPlugin.onEnable(AbstractAuthPlugin.java:33)
    at net.md_5.bungee.api.plugin.PluginManager.enablePlugins(PluginManager.java:226)
    at net.md_5.bungee.BungeeCord.start(BungeeCord.java:303)
    at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:37)
    at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)