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Try this,
Open the server.properties file, set use-native-transport=false
Will have a performance hit, but might stop it from exploding
If that doesn’t work check your Java version
java -version
If it outputs Java 10 or greater that could be your issue. You need to have Java 8 if not then java 7.
Searching “spigot-1.8.8.jar:git-Spigot-21fe707-e1ebe52 unable to access address of buffer” I found people downgrading java versions so I’m 80% is your current java version.