Internal error when webpage is shown inside webviewer (MIT App Inventor Companion)

When I open the following page in Chrome on my iphone everything works fine

Instead, if I open the page inside a webviewer component and I open the app in MIT App Inventor 2 Companion, after a little while I get an error message saying that "An Internal error occurred".

Try in MIT Companion.

It loads fine for me (on Android). Are you testing the app on the iOS companion, too?

Yes, the link works fine in iOS. But if I open it inside the webvewer component it crashes.

Try in MIT Companion.

Is the companion you are testing it on is on the iPhone? I apologize for the lack of clarity.

Yes, on the iphone