Trouble activating plugin

Hi,

We have a customer on a shared hosting who is trying to install you’re plugin and got an open_basedir error (see below).

The sites are placed on the same server, have a shared (10) IP, but NOT the same IP.

We also tried to install the plugin on 2 sites also together on (another) the same server, one with a private IP and one with shared IP, but also there we get the same error.
So it looks like in someday there is a wrong reference that causes that the plugin can be installed only on 1 account on a shared hosting server.
Can you help us out? We tried everything locally we can think of and both customers would like to checkout you’re plugin.

Thanks in advance!

Error on activating:
Plugin could not be activated because it triggered a fatal error.

Warning: require_once(): open_basedir restriction in effect. File(/var/www/vhosts/domain-with-plugin-activated.com/httpdocs/wp-content/plugins/pronamic-ideal/vendor/composer/autoload_real.php) is not within the allowed path(s): (/var/www/vhosts/anotherdomain.com/:/tmp/) in /var/www/vhosts/anotherdomain.com/httpdocs/wp-content/plugins/pronamic-ideal/vendor/autoload.php on line 5

Warning: require_once(/var/www/vhosts/domain-with-plugin-activated.com/httpdocs/wp-content/plugins/pronamic-ideal/vendor/composer/autoload_real.php): failed to open stream: Operation not permitted in /var/www/vhosts/anotherdomain.com/httpdocs/wp-content/plugins/pronamic-ideal/vendor/autoload.php on line 5

Fatal error: require_once(): Failed opening required ‘/var/www/vhosts/domain-with-plugin-activated.com/httpdocs/wp-content/plugins/pronamic-ideal/vendor/composer/autoload_real.php’ (include_path=’.:/usr/share/php:/usr/share/pear’) in /var/www/vhosts/anotherdomain.com/httpdocs/wp-content/plugins/pronamic-ideal/vendor/autoload.php on line 5

https://wordpress.org/plugins/pronamic-ideal/