Ok, more weird stuff happened but it's fixed now.

When I tried opening a 1040 and error message said that I needed to install a state tax return. That state tax return has already been installed. But I still did an update of installed products. Still had the problem when trying to open the 1040.

So I did an installation of new products. It was as though nothing was installed in the 2020 program.

Everything is back to normal now after I downloaded new products.

Thanks for helping.