Server Not Starting [Server thread/WARN]

I am trying to get my Paper Spigot server up and running. I have all the world files in there, and it runs, but the server is never able to boot due to these errors:

Any thoughts?

The errors point to SQL related issues. MineOS Turnkey comes with MySQL, but has it been configured both on the MySQL and Paper Spigot end to work together? (e.g., created tables/usernames/passwords?)