Missing CSS File
Missing file: style.css
Theme would not install, I suspect because the style.css file is missing.
Possible Answers to Your Question:
If you are installing Layers, make sure it is being downloaded from layerswp.com and NOT github, then follow the install guide:
If you are trying to install Layers Pro, it is a plugin and gets uploaded under Plugins > Add New. I recommend activating Pro on layerswp.com/layers-pro/ so you can download an updated copy that is not double-zipped. If you are using a codecanyon download, you must unzip it first to find the plugin zip to upload into WordPress.