I changed the PHP version for the domain to 7.3 and now get this string of errors when trying to install (haven't got as far as connecting to the database yet).


Warning: opendir(./language): failed to open dir: No such file or directory in /home/martypics/public_html/admin/include/languages.class.php on line 131

Warning: readdir() expects parameter 1 to be resource, bool given in /home/martypics/public_html/admin/include/languages.class.php on line 132

Warning: closedir() expects parameter 1 to be resource, bool given in /home/martypics/public_html/admin/include/languages.class.php on line 184

Warning: Cannot modify header information - headers already sent by (output started at /home/martypics/public_html/admin/include/languages.class.php:131) in /home/martypics/public_html/install.php on line 238

Warning: include(/home/martypics/public_html/admin/themes/clear/themeconf.inc.php): failed to open stream: No such file or directory in /home/martypics/public_html/include/template.class.php on line 1141

Warning: include(/home/martypics/public_html/admin/themes/clear/themeconf.inc.php): failed to open stream: No such file or directory in /home/martypics/public_html/include/template.class.php on line 1141

Warning: include(): Failed opening '/home/martypics/public_html/admin/themes/clear/themeconf.inc.php' for inclusion (include_path='.:/opt/cpanel/ea-php73/root/usr/share/pear') in /home/martypics/public_html/include/template.class.php on line 1141

Fatal error: Uncaught --> Smarty: Unable to load template 'file:install.tpl' <-- thrown in /home/martypics/public_html/include/smarty/libs/sysplugins/smarty_internal_template.php on line 195

which piwigo package did you download?

We don't know your site nor what you did to your installation. Always redirecting to install.php isn't normal, and there also isn't anything you'd have to delete. Check your .htaccess file if any, and what your server configuration (e.g. /etc/apache2/httpd.conf if Apache) has as DirectoryIndex files, it should contain index.php but not install.php.

Anyway, the first thing would be to not use PHP 7.x but 8.1.

Nothing. If it is Piwigo that keeps redirecting (you didn't say whether it's doing that from index.php or your server is) then the installation wasn't successful. Check if local/config/database.inc.php looks complete and sensible and also has an entry
define('PHPWG_INSTALLED', true);

After successful installation it should look like this:

<?php
$conf['dblayer'] = 'mysqli';
$conf['db_base'] = 'DATABASENAME';
$conf['db_user'] = 'DBUSER';
$conf['db_password'] = 'DBPASSWORD';
$conf['db_host'] = 'localhost';

$prefixeTable = 'piwigo_';

define('PHPWG_INSTALLED', true);
define('PWG_CHARSET', 'utf-8');
define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');

?>