Unable to install theme – "The theme is missing the style.css stylesheet."
Most likely you are trying to upload entire package, not just a theme. Please make sure to extract purchased and downloaded ZIP file to your computer first, using free software like iZip (for Mac) or 7zip (for PC). All necessary files are inside the package, including theme.
No image thumbnails or
Attachment Missing errors.
Please make sure to add “Featured image” to each post you create. It can be done on the right side of WordPress post editor.