Cant install Two joomla sites due to (ISPC?) mixing them together

I have a major problem with my newly fresh installed server ISPC 3 with DB8 the perfect setup.
When I install a Joomla site al is working. If I try to install a different Joomla site al sites are broken up at one point (blank page) at front site and at the backend site. At first I thought I installed server wrong or used the wrong php-mod (that's why my other threats the couple of days about what php-mod to use) installed the server at least three times from scratch already....
Today I finally get some sort of direction what is wrong.
Installed a joomla site back with Akeeba Pro and it worked fine. after I try to install a second one (fresh joomla install) I get a blank page, when I chance php-fpm to fast-cgi and try the fresh Joomla install again this works for now. But my other site stops working with this code:

Code:

Warning: file_exists(): open_basedir restriction in effect. File(/var/www/clients/client1/web2/web/site/libraries/vendor/joomla/application/src/AbstractApplication.php) is not within the allowed path(s): (/var/www/clients/client1/web7/web:/var/www/clients/client1/web7/private:/var/www/clients/client1/web7/tmp:/var/www/musicfromhell.nl/web:/srv/www/musicfromhell.nl/web:/usr/share/php5:/usr/share/php:/tmp:/usr/share/phpmyadmin:/etc/phpmyadmin:/var/lib/phpmyadmin) in /var/www/clients/client1/web2/web/site/libraries/vendor/composer/ClassLoader.php on line 354

Fatal error: Class 'Joomla\Application\AbstractApplication' not found in /var/www/clients/client1/web7/web/libraries/joomla/application/base.php on line 20

As you can see if you read the code there are 2 sites listed in it client1 site7 and client1 site2. This was site7 and was working okay before I tried to install the other one in site2

I am getting crazzy by now trying to get it to work.... is this a bug I stumbled upon?

Appie

 

Thought so my self checked conf and db manually, and there was nothing wrong so that's why I decided to start fresh again with just a fresh downloaded joomla install. Even than after a fresh uploaded joomla install if I go to the site to install the joomla site I get (sometimes) blank page... Sometimes I can install fine and get a blank page after a wile.
I agree it has something to do with joomla or the php-mod's because the shop (magento) is working fine on the same website..

 

Still open base dir faults, and yes I chanced the client Id overnight from 1 to 3 to give that a chance also:

PHP:

 [Sat May 16 12:06:49.678423 2015] [:error] [pid 31167] [client 84.24.164.146:63217] FastCGI: server "/var/www/clients/client3/web7/cgi-bin/php5-fcgi-*-80-musicfromhell.nl" stderr: PHP message: PHP Warning:  realpath(): open_basedir restriction in effect. File(/var/www/clients/client1/web2/web/site/libraries/fof) is not within the allowed path(s): (/var/www/clients/client3/web7/web:/var/www/clients/client3/web7/private:/var/www/clients/client3/web7/tmp:/var/www/musicfromhell.nl/web:/srv/www/musicfromhell.nl/web:/usr/share/php5:/usr/share/php:/tmp:/usr/share/phpmyadmin:/etc/phpmyadmin:/var/lib/phpmyadmin) in /var/www/clients/client1/web2/web/site/libraries/fof/autoloader/fof.php on line 54
[Sat May 16 12:06:49.678503 2015] [:error] [pid 31167] [client 84.24.164.146:63217] FastCGI: server "/var/www/clients/client3/web7/cgi-bin/php5-fcgi-*-80-musicfromhell.nl" stderr: PHP message: PHP Warning:  file_exists(): open_basedir restriction in effect. File(/var/www/clients/client1/web2/web/site/libraries/vendor/joomla/application/src/AbstractApplication.php) is not within the allowed path(s): (/var/www/clients/client3/web7/web:/var/www/clients/client3/web7/private:/var/www/clients/client3/web7/tmp:/var/www/musicfromhell.nl/web:/srv/www/musicfromhell.nl/web:/usr/share/php5:/usr/share/php:/tmp:/usr/share/phpmyadmin:/etc/phpmyadmin:/var/lib/phpmyadmin) in /var/www/clients/client1/web2/web/site/libraries/vendor/composer/ClassLoader.php on line 354
[Sat May 16 12:06:49.678514 2015] [:error] [pid 31167] [client 84.24.164.146:63217] FastCGI: server "/var/www/clients/client3/web7/cgi-bin/php5-fcgi-*-80-musicfromhell.nl" stderr: PHP message: PHP Fatal error:  Class 'Joomla\\Application\\AbstractApplication' not found in /var/www/clients/client3/web7/web/libraries/joomla/application/base.php on line 20

and I notice that its a fastcgi server message but site is using php-fpm, but maybe this is nothing?

 

Just a little update If I edit the file folder.php /web/libraries/joomla/filesystem and comment out the line

PHP:

// We need to get and explode the open_basedir paths
            //$obd = ini_get('open_basedir');

the Joomla install woks fine. Only after install of this fresh Joomla site my other working Joomla site immediately stops working, getting a blank page. So somehow my sites are using the same open_base I am thinking. in ISPC at the webconfiguration the open_basedir are just fine as far I can see

Code:

var/www/clients/client3/web7/web:/var/www/clients/client3/web7/private:/var/www/clients/client3/web7/tmp:/var/www/musicfromhell.nl/web:/srv/www/musicfromhell.nl/web:/usr/share/php5:/usr/share/php:/tmp:/usr/share/phpmyadmin:/etc/phpmyadmin:/var/lib/phpmyadmin

nothing pointed to the client1 web2 site???

 

You should check the website in client3/web7 for anything that uses the path client1/web2, e.g. try

Code:

cd /var/www/clients/client3/web7/web
grep -r 'client1/web2' *

Maybe there is something wrong in the website configuration that tries to access a path outside it's own web (or vice versa).

 

Crodon thanks for thinking along with me, but I think I solved the problem (keeping my fingers crossed).
I chanced from php-fpm to fast-cgi and don't use the joomla ftp any more, until now all is working fine. On my old server setup I had to use the joomla ftp to get things working, so I assumed I should use it again, apparently not.

The one thing I still find very strange is the fact, that when I used the Joomla ftp with the correct ftp settings to that site its able to mes up all other sites?? For mine setup its not okay but I only host my own sites and from 1 friend of mine, but what if you host for real clients and a other one starts using joomla's ftp, you would have a big problem.