IFrame to display web page based on selected value in table

I prepared this application some time ago and it's been a while since I've been able to get back to it. I assume one of the latest updates had an effect on this. Can someone tell me how I can select a row in table2 (which is a URL) and have the web page for that url appear in the iFrame? Here's a screenshot of the iFrame and table2 along with what I think is the pertinent inspector field.

Below is the query that supports table2.

{{table2.selectedRow.serpstack}}

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