Hello,
Provide us with FTP access to your site to check the WooCommerce Dynamic Pricing & Discounts plugin error, please. We will contact plugin developers. Do you allow sharing of your access to developers of this plugin to allow them to take a closer look at the issue?
I see that you installed 2 page builders: Elementor and WPBakery. It’s not recommended to use both builders at the same time. So, what page builder do you choose?
Regards