I followed the instructions for installing v 5.1 from the previous version I had (2.6.1).  Prior to this, I had a soledad parent theme and a child theme (running) installed.  When I got to the install step for 5.1, I got an error message requiring a style.css file.  I then retrieved my previous style.css file from the original child soledad theme and reinstalled.  When I went to activate it within Wordpress, I got an error that there was no parent theme.  During the previous installation, I also deleted the previous soledad themes as instructed. Now I don't know what to do.