I tried updating to http/2 following this https://techwombat.com/enable-http2-apache-ubuntu-16-04/ and was initially throwing a mysql_connect error which seemed to involve an outdated version of wordpress. I reversed all of the steps in the ticket and deleted W3cache from my plugins folder and it still wouldn’t work. I think reverted to a backup from yesterday and now I can’t even connect to my site. My client is supposed to launch tomorrow and she is going to be furious.