Hope you can help.
Since the last couple of updates when we use the category filter dropdown in products, when in admin, we get a blank screen. Checked the error log and we are getting
PHP Catchable fatal error: Object of class WP_Error could not be converted to string in /.../public_html/wp-includes/pluggable.php on line 894, referer: http://www.peggyjane.co.uk/wp-admin/edit.php?post_type=product
As there are quite a few products this is causing my client some annoyance and a fair few emails to me.
I'm getting the same problem in a new install I starting to set up for a new client.
I know there have been some changes to the filter category recently.
Grateful if you have any suggestions.