Hi,
I’ve solved the PHP warning by adding
error_reporting(E_ERROR);
to your functions.php. Don’t know why didn’t work for you.
A problem I see, is that you are using Avada without our child theme. Which makes it only partially compatible.
You than have deleted or renamed the virtual pages, which should remain untouched.
I’ve fixed this using this tutorial : http://docs.wpgeodirectory.com/how-to-restore-virtual-gd-pages/
I’ve added the location switcher, because your default location was Zurich and you only had a place in basel.
I’ve also fixed various other things that were not setup correctly.
But still the listings page are returning 404 and I think that’s due to Avada theme being use without our child theme. It could also be one of 29 plugins installed…
I’d try installing and activating Avada GD Child theme and if that doesn’t fix, try to disable all non GD plugins momentarly to see if one of them is the culprit.
let us know,