You wrote:
Secondly, there should not be any stray files inside your wp-content/themes/ directory. There should be theme directories, and then files inside those directories.
So I deleted the “stray file” index.php. Now I read this:
“The HTML code and CSS references that hold the structure of your page are generally found in the index.php file in your Theme folder.”
https://tinyurl.com/27pz7w
Maybe I should click on the word “cutline” at the bottom of my page, instead of the word “copyright”, download the theme zip file again, and upload the new file. Will that work?
Do I need to delete the old theme folder, or can I just overwrite?