I can't upload the logo in the listing

I’ll need a little more information on what’s happening to help;

– is this from the submit listing form, or form the dashboard?
– does the listing itself submit and show as pending?
– does everything else seem to work (ie details show up, emails are sent, etc)?
– Does anything show in the logo area on the add/edit listing screen of the dashboard? A broken image or nothing at all?
– Do you see the image in the media library or does it just seem to disappear altogether?

– form the dashboard
– email is not sent
– in logo area on the add/edit listing screen of the dashboard nothing show, only link “Upload A Logo”
– I see the image in the media library

When you click on Upload a Logo and select the image, then click Set Featured Image in the bottom right, it doesn’t appear in that metabox?

No

Can you set featured images on posts or pages?

yes

That’s something I’ll have to look into closer.

Have you tried disabling other plugins just to make sure it isn’t a conflict (if you can)? I ask because the featured image functionality is native to WordPress. The plugin doesn’t alter or extend it in any way, short of changing the labels via gettext.