I install DIGI TEMPLATE SWITH but when I try to configure I receve follow error message:
1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 3 SQL=INSERT INTO `#__update_sites_extensions` (`update_site_id`,`extension_id`) VALUES (18,)
perhaps are you using "Advanced Modules Manager" component?
If you are not using that component, I would need few more details to understand the problem.
Anyway, you can try to rename/delete the file "updatesites.php" in "plugins/system/digi_template_switch/administrator/elements" folder. The plugin will not generates automatically its update site to get updates, but the error seems to be related to this file.