Calls to /wp-admin/admin-ajax.php on gallery opening

Hello,

multiple visitors to my site were blocked by the security plugin because at every gallery opening, similar URLs were called by the Gallery Plugin:

https://www.example.com/wp-admin/admin-ajax.php?action=GalleryBox&current_view=3&gallery_id=33&tag=0&theme_id=1&shortcode_id=85&sort_by=order&order_by=asc&current_url=https://www.example.com/about-us/&bwg_random_seed=50574895&image_id=218&filter_tag=0&filter_search_name=

Why your Gallery Plugin calls the website admin section and how to prevent these?