smayor

I had this problem today. I’m no techie but this worked for me after much gnashing of teeth and midnight wailing! I had made FTP backups on my own computer of the WordPress installation and had a backup on the server of the database. My server management software is Plesk 12 and my root folder is /httpdocs, and I’m on a Webfusion VPS.

You need to have: backup of files that were on the server. Backup of database and know which number it was (eg “wordpress_3”)

Wipe server. Reinstall WP in /httpdocs making a note of the name of the database it is about to install.
Reinstall theme in /wp-content/themes
Reinstall index.php in /wp-content
Reinstall uploads folder in /wp-content
Reinstall all plugins  in /wp-content/plugins
Reinstall all files beginning “wp-” in /httpdocs
Reinstall xmlrpc.php and index.php in /httpdocs
Reinstall wp-includes folder in /httpdocs

In Plesk, find recent backup of site by clicking on “Subscriptions” / mywebsite.com / backup manager / creation date of backup
In Backup Content area select “Selected objects”. Choose “Database” from the Type of object to restore drop down list; select the database that appears in box below then click the blue box that appears to move it into box on right. Scroll down and click “Restore” Wait for it to do so.
Now go to Server Management / Tools and settings / Database servers and click on the right hand tab to show all the databases on the server. Against the one just restored click “Manage hosting” Choose “Export dump” and save it to /httpdocs. Now choose “import dump” from the database assigned to the website (you made a note of this when you reinstalled WordPress) and import.

Enter WordPress control panel through Plesk: Subscriptions / mywebsite.com / WordPress / Administrative interface (if you can’t get in go to “change settings and enter a new username and password). Once in, select your theme. Then go to Settings / General and enter your site title in the Site Title field. Go to Settings / Permalinks and choose “Post name” (or whatever your preference is).

There may be easier ways to do this, but all I can tell you is that it worked. What I can’t tell you, and what makes me nervous of WordPress, is why the problem arose.

I had exactly this problem but resolved it by deactivating the plugin:
All In One SEO Pack version 2.1.4
Shame because I’d spent a lot of time on the plugin before discovering the conflict.