Error in fuction.php

Hello!
When I use link to media file in the gallery option, I get this error : Fatal error: Call to undefined function wc_gallery_get_attachment_link() in /homez.807/signesex/www/wp-content/plugins/wc-gallery/includes/functions.php on line 174

Regards.

https://ww.wp.xz.cn/plugins/wc-gallery/