I'm no expert but my solution would be to backup the database and delete it.
backup your site and then re install using the PS3 downloaded files.
Add a prdoduct and see if that works.
If it does then reinstate your site but not the database. If it works then the issue is with the database if it doesn't then go back one step and do the reverse ie reinstate the database but use the WA PS3 site.
Once you know its with either the database or the site files you have a direction to go in.
If it's the site I find it's easier to carry out the modifications one at a time and test at each stage.
If it's the database then assuming you have not altered that it's an issue for WA technical