Thank you so much for purchasing our theme and contacting our support center.
Please, disable all plugins that are not related to our theme and provide us with your admin access. We will log in and check what is wrong there. You can leave only the following plugins that are required for our theme:
WoodMart core
WooCommerce
Elementor/WPBakery page builder
I turned off all unnecessary plugins and tried them again, the result did not change. I am sending you the admin URL and login information from the secure area. I urgently await your support.
We are glad that you sorted it out. We recommend you also consult with your hosting provider to investigate it further and disable it for the header only. In general, mod security better to be enabled.