Issue while running "Remove old snapshots"

Hi,

I am working on "Remove old snapshot" workflow to remove old snapshots of vCenter VMs, I have added one mail interaction for approval and while approving (delete snapshots) in weboperator window I was suppose to get a list of old snapshots with details, but this is not working after upgrading vco from 5.5 to 5.5.2 .. Image may be NSFW.
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I am unable to figure out what is wrong and how to fix this, please help me.

Image may be NSFW.
Clik here to view.

Thanks !!