Awesome thanks, sorry late reply was away for the day
Updated lab (the 1.13 test server) and the lobby to support 1.13.1.
Instead of using /gamerule to stop mob greifing could we use command blocks?[https://www.youtube.com/watch?v=-CXJwJ2X-5M])
There was a permission issue causing VIPs to loose access to the test server, this has now been fixed and you should be able to connect again.
I’ve set up a new Anti-Cheat system on the test server. Let me know if you have any issues with it (false positives / detections ).