Ok so at least we finally found the source of the problem.
I continue to get this: [12-Apr-2017 18:58:16 UTC] PHP Notice: Trying to get property of non-object ../wp-content/plugins/toolset-classifieds/inc/message_system.class.php on line 202
I am using Mandrill for Transactional E-Mails. However the Mails don't even show up over there, even though all the fields in the backend are properly filled out.
I meant a site where I can do my additional testing without affecting the live environment that customers are accessing.
I wouldn't want the site to crash while customers are using it. Its safer to do a further investigation on a test site. If the current site isn't being actively accessed I could do the testing there.
Alright. Please head over to regionalo.es instead of regionalo.at. This domain is not in use.
Log in with the same credentials.
You can also download it to your local environment from there. I trust you.
However the missing view with the advertiser details is not installed over there. I just added that one recently, but I am sure you can debug it and find a solution.