Yes browser shows the image exists but RO CSVI is not able to download the image and that is because you do not have access to download the image. When importing the image, i am see 403 forbidden error. Check if you have permission to download the image from the server.
<p>You don't have permission to access this resource.</p>
<p>Additionally, a 403 Forbidden
error was encountered while trying to use an ErrorDocument to handle the request.</p>