Error: Theme is missing the style.css stylesheet

When attempting to install a theme on WordPress for the first time, you may experience an error message stating:

"The package could not be installed. The theme is missing the style.css stylesheet. Theme install failed."

No worries! This is quite a common mistake and simple to remedy.

When you purchase a theme license from ThemeForest or Creative Market & download the theme package, you will receive a zipped folder titled something like "themeforest-8253073-hemlock-a-responsive-wordpress-blog-theme".
Unzip this first theme package folder.

Within the unzipped theme package, you will find an additional zipped file with the theme's name as the title ( for example: "hemlock.zip" ).

THIS zipped file is what you will install onto WordPress.