Installation: HTTP Error 500 - site is currently unable to handle this reqeuest

I have followed the steps to install form the instructions for Ubuntu....

I have checked all my permissions and ensured files have copied over appropriately, but am getting this error...

From the log:

[Sat Jul 20 15:11:19.203626 2024] [php:warn] [pid 441531] [client ****] PHP Warning: require_once(./inc/header.inc.php): Failed to open stream: No such file or directory in /var/www/dsgsuna/r.php on line 10

[Sat Jul 20 15:11:19.203687 2024] [php:error] [pid 441531] [client ****] PHP Fatal error: Uncaught Error: Failed opening required './inc/header.inc.php' (include_path='.:/usr/share/php') in /var/www/dsgsuna/r.php:10\nStack trace:\n#0 {main}\n thrown in /var/www/dsgsuna/r.php on line 10

[Sat Jul 20 15:13:07.715596 2024] [php:error] [pid 446857] [client ****] PHP Fatal error: Uncaught Error: Call to undefined function xml_parser_create() in /var/www/dsgsuna/inc/classes/BxDolXmlParser.php:139\nStack trace:\n#0 /var/www/dsgsuna/install/classes/BxDolInstallModulesTools.php(67): BxDolXmlParser->getValues()\n#1 /var/www/dsgsuna/install/classes/BxDolInstallLang.php(29): BxDolInstallModulesTools->readLanguage()\n#2 /var/www/dsgsuna/install/classes/BxDolInstallLang.php(35): BxDolInstallLang->__construct()\n#3 /var/www/dsgsuna/install/classes/BxDolInstallLang.php(81): BxDolInstallLang::getInstance()\n#4 /var/www/dsgsuna/install/index.php(53): require_once('...')\n#5 {main}\n thrown in /var/www/dsgsuna/inc/classes/BxDolXmlParser.php on line 139, referer: https://drstyles.live/index.php

[Sat Jul 20 15:13:08.791059 2024] [php:error] [pid 441966] [client ****] PHP Fatal error: Uncaught Error: Call to undefined function xml_parser_create() in /var/www/dsgsuna/inc/classes/BxDolXmlParser.php:139\nStack trace:\n#0 /var/www/dsgsuna/install/classes/BxDolInstallModulesTools.php(67): BxDolXmlParser->getValues()\n#1 /var/www/dsgsuna/install/classes/BxDolInstallLang.php(29): BxDolInstallModulesTools->readLanguage()\n#2 /var/www/dsgsuna/install/classes/BxDolInstallLang.php(35): BxDolInstallLang->__construct()\n#3 /var/www/dsgsuna/install/classes/BxDolInstallLang.php(81): BxDolInstallLang::getInstance()\n#4 /var/www/dsgsuna/install/index.php(53): require_once('...')\n#5 {main}\n thrown in /var/www/dsgsuna/inc/classes/BxDolXmlParser.php on line 139, referer: https://drstyles.live/index.php

I have used the auto deploy feature which works, but installs the system on a US based server, but I want a Canadian server for some specific reasons.

Any thoughts or insights would be greatly appreciated.

Cheers