Can anybody please help?
I went to update WordPress yesterday and must have done something wrong because now I cannot get into the back end of my site and I have this strange message on the front-end:
Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, '_show_post_preview' was given in /websites/123reg/LinuxPackage22/mi/nd/yo/mindyourpaws.co.uk/public_html/blog/wp-includes/plugin.php on line 406
plus the site cannot find any pages.
I have tried disabling all plugin one-by-one via ftp but to know avail, unfortunately I'm not a coder so this is all a bit alien to me.
My site is http://www.mindyourpaws.co.uk