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You are using a feature that requires a web browser. Please install a web browser and try again.
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I think and hope clicking on the clips should open a preview but who knows. I use Firefox but of course have MS Edge installed. Where I am seeing this right now is clicking on a Shutterstock media clip.
Clicking on a Shutterstock video or photo clip does open a new tab on Edge on my two Win10 systems. This is the
link I got when I clicked on the 1st video clip preview. You can preview or even download the full clip from that webpage.
There isn't any way to tell how big the clip is from within PD or from the preview webpage, but the size will appear as soon as you click on the Download button:
There have been many reports of people having internet connectivity issues when using PD over the years I've been on the forum, but there hasn't been a consistent cause or resolution that I'm aware of.
On my system, I have to restart Windows if I turn IE11 on or off; and with it off, I get the same error message you saw when trying to preview any Shutterstock clip, even though Edge and the CL App Manager worked normally.
Re-enabling IE11 and rebooting restored the Shutterstock preview, but I'm not sure if that will help if IE11 is already enabled on your system.