Uncaught Error: Call to undefined function

Hi,
I’m encountering a critical error on my site.
Here is a screenshot I just made.
This is too complex an error for me to resolve. Also, I hope that some of you will want to look into the problem encountered.`
Thank you

My configuration:
WordPress version 6.1
Thème : Gwangi (version 2.4.2)
Extension actuelle : Author Avatars List/Block (version 2.1.12)
PHP version 7.4.25

<blockquote>`Une erreur de type E_ERROR a été causée dans la ligne 1699 du fichier /home/nvxcco/www/wp-content/plugins/author-avatars/lib/UserList.class.php. Message d’erreur : Uncaught Error: Call to undefined function bbp_get_user_topic_count_raw() in /home/nvxcco/www/wp-content/plugins/author-avatars/lib/UserList.class.php:1699
Stack trace:
#0 [internal function]: UserList->_user_cmp_BBPRESS_post_count(Object(stdClass), Object(stdClass))
#1 /home/nvxcco/www/wp-content/plugins/author-avatars/lib/UserList.class.php(1489): usort(Array, Array)
#2 /home/nvxcco/www/wp-content/plugins/author-avatars/lib/UserList.class.php(1131): UserList->_sort(Array)
#3 /home/nvxcco/www/wp-content/plugins/author-avatars/lib/UserList.class.php(212): UserList->get_users()
#4 /home/nvxcco/www/wp-content/plugins/author-avatars/lib/AuthorAvatarsShortcode.class.php(250): UserList->get_output()
#5 /home/nvxcco/www/wp-includes/shortcodes.php(355): AuthorAvatarsShortcode->shortcode_handler(Array, ”, ‘authoravatars’)
#6 [internal function]: do_shortcode_tag(Array)
#7 /home/nvxcco/www/wp-includes/shortcodes.php(227): preg_replace_callback(‘/\\[(\\[?)(author…’, ‘do_shortcode_ta…’, ‘[authoravatars …’)`