Fatal error: Uncaught Error: Call to undefined function wp_get_additional_image_sizes() in /srv/users/muscleexpert/apps/muscleexpert/public/wp-includes/media.php:861 Stack trace: #0 /srv/users/muscleexpert/apps/muscleexpert/public/wp-content/plugins/wp-user-avatar/deprecated/wp-user-avatar/includes/wpua-globals.php(104): get_intermediate_image_sizes() #1 /srv/users/muscleexpert/apps/muscleexpert/public/wp-content/plugins/wp-user-avatar/deprecated/wp-user-avatar/wp-user-avatar.php(55): require_once('/srv/users/musc...') #2 /srv/users/muscleexpert/apps/muscleexpert/public/wp-content/plugins/wp-user-avatar/deprecated/wp-user-avatar/wp-user-avatar.php(16): PPRESS_WP_User_Avatar_Setup->_load_wpua() #3 /srv/users/muscleexpert/apps/muscleexpert/public/wp-content/plugins/wp-user-avatar/deprecated/wp-user-avatar/wp-user-avatar.php(75): PPRESS_WP_User_Avatar_Setup->__construct() #4 /srv/users/muscleexpert/apps/muscleexpert/public/wp-content/plugins/wp-user-avatar/src/Base.php(270): require('/srv/users/musc...') #5 /srv/users/muscle in /srv/users/muscleexpert/apps/muscleexpert/public/wp-includes/media.php on line 861