WordPress Speed Up Service | WordPress Website Maintenance Packages Reply To: Fatal Error When Trying To Access Login Page/All Website pages down!, by ThemesGrove Hello, It may cause for revolution slider. Open your site from FTP server. Go to the plugins directory and rename [revslider] this folder name to anything. After doing this hopefully you will get back your site. then reupload your Revolution slider plugin and active and use it. Thanks. Reply To: Fatal Error When Trying To Access Login Page/All Website pages down!