Recently, I decided to change my store's theme to recreate/brand it and in doing so it seems like all the coding and files have disappeared. For example, the files titled: Templates, Sections, Snippets, Assets, and Locales are empty. I believe this may be the problem as to why my store has a pop of "404 Not Found" for its homepage. It also isn't applying any new themes to try to fix the issue.
Would really appreciate the help from the experts here!