Dear colleagues I've finally had the time and the need to tinker with a problem when trying to add a subdomain and had this error in apache logs: Request exceeded the limit of 10 internal redirects due to probable configuration error I noticed that it happens nearly always when putting a Drupal or other Composer managed site. Those Composer managed projects are always working in a subfolder where the main data is and then a web folder where the website is. For it to work as expected we have been using the Sites>website>Options>Apache Directives>DocumentRoot setting for the WEB subfolder to be the document root. In those situations we have been having constant problems putting a subdomain in ISPC, because we have been setting subdomains folder and "Redirect Path" relatively to the root web folder of the main website. TLDR; The tested working solution is to move the subdomain folder to be subfolder of the DocumentRoot folder, set in the options of the main website domain (Sites>website>Options>Apache Directives>DocumentRoot) and the setting of the Redirect Path in ISPC subdomain to be relative of the same path, so: THE SOLUTION ISPC Sites>website>Options>Apache Directives>DocumentRoot: DocumentRoot "/var/www/clients/client1/web1/web/project/web" mkdir -p /var/www/clients/client1/web1/web/project/web/subdomain ISPC Sites>Subdomain for website > Redirect Path:/subdomain/ I home that somebody will find this useful...
