Please use child theme that comes along with theme bundle, that is zipped file which comes when you download from celestial download link
It seems you had made many changes on themes name and its folder. So you need to keep this things on mind:
1> When you update your theme to the latest version, all the custom changes will lost.
2> After you installed child theme on your site, Functions.php file will be present on theme bundle itself,. As you have made changes theme name, be sure to change template attributes of child theme style,css file to st_celestial