Hello. I bought themes from envato and I tried to upload 5 of them on shopify but a message pops up. (Please take a look at the screenshot) Best regards.
The best way to get the support is Contact your purchased Theme Author. Contact Author and let them know because Item Author are best expert about their Item functionality.
make sure you are installing only the correct theme folder and not the entire download from envato
Make sure you are actually uploading shopify themes and not wordpress themes…
You MUST extract download package and upload theme file inside