Before installing the theme, please unzip "red-art-shopify-arts-portfolio-gallery-store.zip"and upload the "red-art.zip " file to Shopify to avoid the "layout/theme.liquid" missing template error.
Theme Extractions
Download the package from Themeforest.net (it will be in ZIP format).
Find the file "themeforest-xxxxxx-red-art-shopify-arts-portfolio-gallery-store.zip" in your folder.
Extract the contents of the ZIP package you just downloaded.
Upload the "red-art.zip". file to your Shopify store.
Upload Theme Through Shopify Admin Panel
Log in to the Shopify Panel.
Click "Online Store" from the left-hand menu.
Click "Add theme" > "Upload zip file."
Select and upload the "red-art.zip". file. The theme will then be uploaded to your store.
Once the upload is complete, click "Actions" > "Publish."
