I've added a security check to ensure no errors are displayed in the console.
There is now a new version check API with that I can check if your current version is the latest version or an outdated version. I use my web-api for that because the spigot-api is a little bit too slow to check the new versions. (I had a lot of experiences with that in the past...)
Oh and I changed one word in the message.yml which doesn't matter right now!

Have fun with the new update!