Elementor WHMCS Elements Pro Documentation
Extract the elementor-whmcs-elements-pro.zip file from the File zip that you have downloaded from themeforest (if you did download the whole package/main file). this is the plugin file that you need to upload. Or if you just downloaded the installable wordpress file only then you don’t need to do the above work. Just :
To manually upload your new Plugin, login with your credentials to your website and locate the wp-content folder in your WordPress install files. Unzip the elementor-whmcs-elements-pro.zip (the installable Plugin File) and upload the un-zipped Folder into the: wp-content/plugins folder.
Once uploaded, activate the plugin by heading to the “Plugins” menu in the WordPress Dashboard. Locate the Elementor Whmcs Elements Pro and hit “Activate”.