Chrome: Cross-origin plugin content from must have a visible size larger than 400 x 300 pixels
That is likely Flash content being blocked (check the console, it will likely report a URL with an swf file). Google started de-emphasizing Flash over a year ago. According to the article and forum thread below, Chrome actually started "pausing any cross-origin plugin content smaller than 400px in width or 300px in height" in September 2015, now I suppose it's blocking it altogether:
Original forum thread of Chromium developers:
https://groups.google.com/a/chromium.org/forum/#!msg/chromium-dev/QL2K4yFVg_U/vj44YWOaAwAJ
Try in Incognito mode. I had the same issue but the message is not showing in Incognito so I assume it might be caused by some browser extensions.