Ticket #54464: 54464.diff

src/wp-content/themes/twentytwentyone/inc/template-functions.php

@@ -457 +457 @@
                 $height = (int) $size[1];
         } elseif ( $attachment && is_object( $attachment ) && $attachment->ID ) {
                 $meta = wp_get_attachment_metadata( $attachment->ID );
-                if ( $meta['width'] && $meta['height'] ) {
+                if ( isset( $meta['width'] ) && isset( $meta['height'] ) ) {
                         $width  = (int) $meta['width'];
                         $height = (int) $meta['height'];
                 }