The most common way to install the theme is to install using the built-in Theme Installer. You can find it by going to Appearance > Themes Just follow the points below:
- Click Add New button.
- Click Upload Theme button.
- Select glekk.zip
- After you have uploaded your theme click Install Now button and your installation will begin. If the installation is successful, you will receive a notification about this.
A common issue that can occur when installing a WordPress themes is “The package could not be installed. The theme is missing the style.css stylesheet” error message being displayed when uploading or activating the theme. One of the reasons you may receive this error is if you have uploaded the incorrect file. Be sure to read this article