Can you please post a picture/screenshot of what you mean? The black square icon with the question mark usually indicates an app that is awaiting a license code or an app that didn't install correctly. Beyond that, I'm not sure what you mean, so a picture should help.
If you want to thank someone for their comment, do so by clicking the Thumbs Up icon.
If your issue is resolved, don't forget to click the Solution button on the resolution!