On the Faithlife Study Bible (FSB) tab, under the comments for Acts 12:21, there is an image for A Judgement Seat In Jerusalem. When rolling over the image, the pop up window is blank. When clicking on the image, another tab opens, but displays a graphic for Ancient Jericho.
Also, there is another image below it that represents a Judgement Seat, Corinth. When rolling over that image, the pop up window displays the image. Clicking on this image opens a tab displaying a graphic for the Parthenon.
I tried this on Windows 11 and on Linux using a Web browser. Got the same results for two different browsers, Zen which is a Firefox derivation and with Brave browser.
In the Windows 11 Desktop application, rollovers display a pop up window showing a text description of each. Clicking on each of the images opens tabs to the correct link.