"Block rss render error" occurs on Places & Tastes page.

Steps:
1. Log in to Studio as admin.
2. Go to Places & Tastes.
3. Scroll the page and verify the preview of RSS block in second column.
Issue: Message is displayed in preview "There was an error during rendering of the block". [screenshot 1]
4. Wait for the timeline to refresh.
Issue: "Error occurred when getting landing page preview" occurs. [screenshot 1]
5. Click Edit.
Issue: "An unexpected error has occurred" is displayed. [screenshot 2]

Remarks: Exception from prod.log attached. Error from browser console attached.