Hi aklejdi
I could reproduce this issue. I am not sure about the root cause. I could find that this is not an issue with the kapsel offline template. Because it works when I am using a different odata service.
I doubt the recent requirement (from smp sp05) of the maxlength property in the key field of odata - it is mandatory to have a maxlength property in key property of odata as given below. Which is missing in the service you are trying with.
Regards, Midhun
SAP Technology RIG