Plugins fail to install

Hello, I have been trying to install the required plugins on BeTheme (themeforest) wich I purchased and I cant

error message:
Unpacking the package…
Installing the plugin…
The package could not be installed. The plugin contains no files.
Plugin installation failed.

I tried to use the betheme.zip to upload the plugins and also failed, still the same message

can anyone help?

Use this link to contact theme author:

Some more info:

Hi @pedrolopes11

Hope this Documentation will help you. Otherwise please contact theme Author.

Thanks