I thought I was a good tester but it turns out, I'm not. Sorry.

These errors fixed in this version:
- People could open other's ender chest when they have "sst.enderchest" permission.
- Fixed compability with WorldGuard.
- Console prefix's color was faulty in latest Paper versions.
- Reply command throws an error when there is no one to reply.
- Outdated language files could cause a NPE, fixed. Now it sends a warning to console and a blank message to player.
- Ping, heal and feed commands throws an error when given player is not offline.

Added:
An update checker.

You should reset your configuration files. Or you can try getting new updates manually from here.