We have successfully updated to 17w14a.
Enjoy!
Note: Chat commands may not work correctly if many players are being harmed at once as this is logged into the console, console spam can cause chat commands to stop working.
If chat commands aren’t working, you can use their /trigger alternative. There is a list of trigger commands you can use in the server information book, you can also use [Tab] after typing ’/trigger’ to cycle through them.