Hello, I'm using Ubuntu server and Plesk 10.0.1 latest version, and since this morning out of the sudden whiteout any changes made to server for past 20 days my php sites are not working. Once I have enabled display errors in php.ini file located at /etc/php5/apache2/php.ini file I sow this error message Warning: Unknown: open_basedir restriction in effect. File(/var/www/vhosts/neseco.co/httpdocs/index.php) is not within the allowed path(s): (/var/www/vhosts/neseco.co/httpdocs/:/tmp/) in Unknown on line 0 Warning: Unknown: failed to open stream: Operation not permitted in Unknown on line 0 Fatal error: Unknown: Failed opening required '/var/www/vhosts/neseco.co/httpdocs/index.php' (include_path='.:') in Unknown on line 0 Now I tried any reasonable solution. 1. Adding vhost.conf file to each domain and setting open_basedir none option 2. Modifying php.ini file It is strange that every website that I'm hosting is not working, Plesk Panel is the only thing that is working under php. Can anyone suggest as I don't know where and what to look for anymore. Thank you!