I had downloaded an existing theme to use as a base and adjust, I just changed the logo and saved it to work on later.
When I tried to open it, it said the project was made with a newer version, would I like to update, so I updated as I was 1 version behind. Did that and tried to open it again and it still says the same error. If I click no to update, it doesn't open the theme, if I click update, I'm just back to the same TT version I just updated to.
The sample theme was the "welcome to our Cuisine" wordpress theme.