Russ Haft

The code in libs/class.FileSystem.php function imageThumbnail(…) assumes that wp-content/uploads is located beneath ABSPATH, which is not necessarily the case if WP_CONTENT_DIR is defined otherwise.

In particular, line #386 (v5.0.7):
$path = str_replace(site_url('/'), $abspath, $path);

This creates a filesystem path to the thumbnail beneath ABSPATH which may not be the case. This assumption breaks the code and results in a 404 image since the thumbnail file will not be found.

-Russ

This is directly related to my post: https://www.wpdownloadmanager.com/support/topic/incorrect-method-used-to-determine-path-to-package-image/#post-120685

Thanks.