How to get rid of 404 in WP due to the addition to the url "tag=yandex-morda" from Yandex.Direct?

Question

htaccess

Direct sometimes adds "tag=yandex-morda" to the link address. WordPress Thinks this is a page of a non-existent tag. As a result, by clicking on the ad, the user sees 404.
How to correctly solve this problem?
Yandex support says "You need to configure the use of arbitrary URL parameters".
Could not google what it is and how.