FreePBX 17: Module Admin -> Check online -> Slow load

In FreePBX 17 when you go in to module admin and click check online it blanks out all of the tabs and silently sits. No errors in console or logs. The page stays in a seemingly broken state for about a minute.

It seems this is because the page load is being blocked by

scheme http
filename /www/delivery/ajs.php
zoneid 62
cb 55922821803
charset UTF-8