Steps to reproduce:

1. Create the new ContentType with field type ezobjectrelation (single)
2. Create the new content, add an image to the relation field
3. Move image selected in the previous step to trash
4. Go to the content view and Related content tab

Actual result:

Console shows: GET http://ezv1/undefined 404 (Not Found) and Related content tab displays: An error occurred while loading the related content list.

Expected result:

Related content tab should be empty.