The file index.php is part of Plesk distribution.

[AngieH]

One of the harddrives in our server crashed and needed to be replaced. Since replacing the harddrive the websites that were on this harddrive are functioning correctly, but we cannot access plesk control panel. When going to https://localhost:8443/ this error message is shown "The file index.php is part of Plesk distribution. It cannot be run outside of Plesk environment."
There are solutions on the parrallels knowledge database for this, but for Plesk 7.x and 8.x. What can be done to correct this on Plesk 10.1?