Fatal error: Uncaught Error: Call to undefined function wp_get_additional_image_sizes() in /usr/www/users/divethn/wp-includes/media.php:62 Stack trace: #0 /usr/www/users/divethn/wp-includes/media.php(260): image_constrain_size_for_editor(512, 512, 'full') #1 /usr/www/users/divethn/wp-includes/media.php(932): image_downsize('1339', 'full') #2 /usr/www/users/divethn/wp-includes/media.php(1055): wp_get_attachment_image_src('1339', 'full', false) #3 /usr/www/users/divethn/wp-includes/general-template.php(871): wp_get_attachment_image_url('1339', 'full') #4 /usr/www/users/divethn/wp-includes/general-template.php(912): get_site_icon_url(512, '', 0) #5 /usr/www/users/divethn/wp-includes/general-template.php(3135): has_site_icon() #6 /usr/www/users/divethn/wp-includes/class-wp-hook.php(288): wp_site_icon('') #7 /usr/www/users/divethn/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #8 /usr/www/users/divethn/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #9 /usr/www/users/divethn/wp-includes/general- in /usr/www/users/divethn/wp-includes/media.php on line 62