Iframe src no longer loading

Hello, iframe src used to work fine for me loading wordreference in both windows Anki and Ankidroid, but now it says “Wordreference refused to connect.” Ankiweb doesn’t work either. On Ankidroid I get “net::ERR_BLOCKED_BY_RESPONSE.” I’ve tried variations of the code I found online, variations in writing https, adding text: to {{Wordref}}, and several different URLs, but none have worked.

I use Anki 2.1.50 which I’d like to stay with if possible, to avoid complications with add-ons that haven’t been updated.

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