Thanks for the your reply @fritexvz.
There are indeed some errors in the developer console:
WebSocket connection to ‘wss://public-api.wordpress.com/pinghub/wpcom/me/newest-note-data’ failed:
compiled.js?ver=4.5.1:20 GET https://[removed_host]/wp-admin/admin-ajax.php?action=cloudflare_proxy&proxyURL=zones&proxyURLType=CLIENT 500
Uncaught TypeError: Cannot read property ‘status’ of undefined
Full output: ?v=2.0:16 WebSocket connection to 'wss://public-api.wordpress.com/pinghub/wpcom/ - Pastebin.com
The first error is present on all wordpress pages it seems.
The reason I need the plugin is I’m using APO and cloudflare recommends only using it with the plugin.
All IPs should be allowed through to Apache at this point.
Options -Indexes +FollowSymLinks
Require all granted
As far as I can tell no plugins that would restrict API calls are installed. I’ve tried disabling a few to no avail.