Solved Can´t use Paper instead of Spigot. Why?

[GamesLuk]

Why can't I use Paper on my server (the server crashes)? Spigot works perfectly. Is it because of a plugin or not?
Crash-report: https://paste.ee/p/ptPJU (or in the attachment)

 

[electronicboy]

You have a configuration file from a newer version of paper, downgrading is not supported. The easiest option is to delete the config folder or delete the setting it is complaining about.

 

[GamesLuk]

Thanks for the quick help. Deleting the Config folder fixed the problem!