Not able to see Background Effects in Microsoft Teams

I've read page after page of people all explaining that all anyone needs to do is run Teams, the click on the three dots and pick a background effect.  I suppose this is the proper information to give someone who has never seen a computer before or someone who has an IQ significantly below room temperature.

Now, how about someone offering a realistic suggestion for those of us who have installed the Teams app on our modern laptop computer (in my case a Dell Inspiron 5593) and have clicked on the three dots and have selected to show the Background Effects only to get an empty panel that offers no choices at all, not even Blur.  I would love to tell you what version of Microsoft Teams I am running but I don't know because even when I can get to the menu that includes About, clicking on About does absolutely nothing - so I don't have any way to display the version, but it is whatever version Microsoft downloaded TODAY when I first had the misfortune to need to join a Team Meeting. According to Control Panel, apparently it is version 1.4.00.2879

For those not familiar with the Dell Inspiron 5593, it runs an Intel i7-1065G7 processor,