Moodle 4.x failing to install via command line in Ubuntu

I am following this link to be able to setup Moodle on Ubuntu. Moodle command line instructions. I am getting a failure at line 187 in the /lib/installlib.php. I have put in the correct information about the DB connection (username, pw, etc). I normally install through the moodle web interface. I am wondering if anyone has successfully installed moodle through command line interface with Moodle 4.x before??

/**
 * This is in function because we want the /install.php to parse in PHP4
 *
 * @param object $database
 * @param string $dbhsot
 * @param string $dbuser
 * @param string $dbpass
 * @param string $dbname
 * @param string $prefix
 * @param mixed $dboptions
 * @return string
 */
function install_db_validate($database, $dbhost, $dbuser, $dbpass, $dbname, $prefix, 
$dboptions) {
    if (!preg_match('/^[a-z_]*$/', $prefix)) {
        return get_string('invaliddbprefix', 'install');
    }
    try {
       try {
           $database->connect($dbhost, $dbuser, $dbpass, $dbname, $prefix, $dboptions);
       } catch (moodle_exception $e) {
           // let's try to create new database
            if ($database->create_database($dbhost, $dbuser, $dbpass, $dbname, 
$dboptions)) {
               $database->connect($dbhost, $dbuser, $dbpass, $dbname, $prefix, 
$dboptions);
            } else {
                throw $e;
            }
       }
       return '';
    } catch (dml_exception $ex) {
        $stringmanager = get_string_manager();
        $errorstring = $ex->errorcode.'oninstall';
        $legacystring = $ex->errorcode;
        if ($stringmanager->string_exists($errorstring, $ex->module)) {
            // By using a different string id from the error code we are separating 
   exception handling and output.
            $returnstring = $stringmanager->get_string($errorstring, $ex->module, $ex->a);
            if ($ex->debuginfo) {
                $returnstring .= '<br />'.$ex->debuginfo;
            }

            return $returnstring;
        } else if ($stringmanager->string_exists($legacystring, $ex->module)) {
        // There are some DML exceptions that may be thrown here as well as during 
normal operation.
        // If we have a translated message already we still want to serve it here.
        // However it is not the preferred way.
        $returnstring = $stringmanager->get_string($legacystring, $ex->module, $ex->a);
        if ($ex->debuginfo) {
            $returnstring .= '<br />'.$ex->debuginfo;
        }

            return $returnstring;
        }
        // No specific translation. Deliver a generic error message.
        return $stringmanager->get_string('dmlexceptiononinstall', 'error', $ex);
    }
}

My problem was two-fold. My client had Wide-Area Firewall (WAF) set incorrectly which prevented communication between Moodle 4.1 and the external PostgreSQL database. Then I figured out they failed to correctly install Postgres 'driver' to the VM.