Thanks Greg, I’ve deactivated several other location plugins which I wasn’t using which seem to have resolved the 404 error.
The occasional autocomplete problem is still an issue though. When I first navigate to the advert add screen and start typing in the Location field, sometimes it comes up with “This page can’t load Google Maps Correctly” and sometimes nothing comes up in the location box. However after refreshing the screen (no other alterations made), often the words “enter a location” comes up in the locations box and as I type, Google autocomple starts. Any ideas?
Many thanks