This error is probably the result of corrupt software or the wrong permissions.
Do you see this error on a PHP website? Check your PHP file permissions and the directory in which it is located. Because this problem can occur when several user groups have write access to a certain file or folder, make sure that only you (the user) have write access to this file and this folder. We recommend to set the rights to 644 for files, and 755 for folders.
Do you get this error while running Perl/ CGI scripts, then try to set the interpreter of your script as followed: