page-sitemap.xml fatal error with ‘Images in Sitemaps’ option is enabled

Hello. When I have the ‘Images in Sitemaps’ option enabled, the /page-sitemap.xml page fails with the error “/page-sitemap.xml”.

I have enabled debugging and and it reports the following error_log. It appears to point to a problem with an image, however I’m uncertain what the problem could be. There’s nothing particularly unusual about the Media Library and all files have standard names with no special characters aside from dashes. When I disable the ‘Images in Sitemaps’ option, the /page-sitemap.xml page works again.

[24-Mar-2024 03:14:58 UTC] PHP Fatal error: Uncaught TypeError: Unsupported operand types: string * float in /opt/bitnami/wordpress/wp-includes/media.php:467
Stack trace:
#0 /opt/bitnami/wordpress/wp-includes/media.php(135): wp_constrain_dimensions()
#1 /opt/bitnami/wordpress/wp-includes/media.php(268): image_constrain_size_for_editor()
#2 /opt/bitnami/wordpress/wp-includes/media.php(970): image_downsize()
#3 /bitnami/wordpress/wp-content/themes/uncode/core/inc/compatibility/rankmath/class-uncode-rankmath.php(88): wp_get_attachment_image_src()
#4 /opt/bitnami/wordpress/wp-includes/class-wp-hook.php(324): Uncode_RankMath_Support->add_images_to_sitemap()
#5 /opt/bitnami/wordpress/wp-includes/plugin.php(256): WP_Hook->apply_filters()
#6 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/traits/class-hooker.php(102): apply_filters_ref_array()
#7 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-image-parser.php(135): RankMath\Sitemap\Image_Parser->do_filter()
#8 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/providers/class-post-type.php(494): RankMath\Sitemap\Image_Parser->get_images()
#9 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/providers/class-post-type.php(209): RankMath\Sitemap\Providers\Post_Type->get_url()
#10 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-generator.php(169): RankMath\Sitemap\Providers\Post_Type->get_sitemap_links()
#11 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-generator.php(135): RankMath\Sitemap\Generator->build_sitemap()
#12 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-sitemap-xml.php(166): RankMath\Sitemap\Generator->get_output()
#13 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-sitemap-xml.php(153): RankMath\Sitemap\Sitemap_XML->build_sitemap()
#14 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-sitemap-xml.php(92): RankMath\Sitemap\Sitemap_XML->has_sitemap_in_cache()
#15 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-sitemap-xml.php(82): RankMath\Sitemap\Sitemap_XML->output()
#16 /bitnami/wordpress/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-router.php(79): RankMath\Sitemap\Sitemap_XML->__construct()
#17 /opt/bitnami/wordpress/wp-includes/class-wp-hook.php(324): RankMath\Sitemap\Router->request_sitemap()
#18 /opt/bitnami/wordpress/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#19 /opt/bitnami/wordpress/wp-includes/plugin.php(565): WP_Hook->do_action()
#20 /opt/bitnami/wordpress/wp-includes/class-wp-query.php(1140): do_action_ref_array()
#21 /opt/bitnami/wordpress/wp-includes/class-wp-query.php(1868): WP_Query->parse_query()
#22 /opt/bitnami/wordpress/wp-includes/class-wp-query.php(3824): WP_Query->get_posts()
#23 /opt/bitnami/wordpress/wp-includes/class-wp.php(696): WP_Query->query()
#24 /opt/bitnami/wordpress/wp-includes/class-wp.php(816): WP->query_posts()
#25 /opt/bitnami/wordpress/wp-includes/functions.php(1336): WP->main()
#26 /opt/bitnami/wordpress/wp-blog-header.php(16): wp()
#27 /opt/bitnami/wordpress/index.php(17): require(‘…’)
#28 {main}
thrown in /opt/bitnami/wordpress/wp-includes/media.php on line 467

Line 476 in media.php refers to:

if ( (int) round( $current_width * $larger_ratio ) > $max_width || (int) round( $current_height * $larger_ratio ) > $max_height ) {
// The larger ratio is too big. It would result in an overflow.
$ratio = $smaller_ratio;
} else {
// The larger ratio fits, and is likely to be a more “snug” fit.
$ratio = $larger_ratio;
}