MyVirtual Background

I had a number of virtual backgrounds saved, and for some reason they don't seem to be there anymore. I was playing around with the studio effects feature, and when I went back to the virtual background feature, the only options shown were None and Blur.  None of the standard backgrounds supplied by Zoom were there, and none of the backgrounds that I saved were there.  Don't know what happened!  Has this happened to any of you before and, if so, how did you fix it?