I don't know what happened. Now every other page I am getting Error 500, Internal Server Error.
This is a real disappointment. I really thought I had something here. Now I have to start over from scratch and look for a new CMS.
Usually if you download a plugin and it's either out of date with the latest version or has faulty properties. It's the plugin developers issue to fix those plugins. But you can easily disable those plugins in order to get the site back in working order. But usually 500 error's are caused by the user of the script.
Note: Oxwall is not a CMS script. If you want to do something CMS related. Use Joomla or Drupal. Those are CMS scripts. Oxwall is a Social Networking Script with CMS plugins for purchase.