Our theme uses a WooCommerce core hook called woocommerce_get_price_html to override the price for not logged-in users. Here is a screenshot https://gyazo.com/52f36ad813c35d560db88dce54a43adc
This plugin either removes this hook or overwrites it with its custom content. That is why our hook doesn’t work as expected. You need to contact the plugin developer for help on this matter.

Kind Regards