Hey everyone, I'm sorry about the weird issue with Java 8. For some reason it compiled the java classes in Java 11. This update will fix that issue.

Changelog:
- Fix Java code being compiled as java 11 code instead of java 8.
- Fix sql error(s) when generating tables.
- Minor improvements to PremiumVanish checks.
- Should fix concurrent modification exception on startup for some users.
- There was a ticket warning that would appear for fresh tickets. This is fixed now.
- Removed annoying Vault debug message.
- ChatTableCleanupTask now runs every 6 hours instead of every hour.
- Only the first letter of a timeunit would work when punishing players for example. Now they all work.
- Minor code cleanup.