The proper way is to find the code that is looking for /tmp and change it too /var/sentora/temp
The less secure (and not recommended) way is to go into module admin > apache config > override virtualhost > select the domain > uncheck open_basedir > save and wait for 5mins for the daemon to update the httpd-vhosts.conf file.
The less secure (and not recommended) way is to go into module admin > apache config > override virtualhost > select the domain > uncheck open_basedir > save and wait for 5mins for the daemon to update the httpd-vhosts.conf file.