In some cases, your WordPress hosting provider may have file restrictions that could limit your ability to install a plugin from the admin area. In this situation, your best option is to install the plugin manually using FTP.
The FTP manager method is the least friendly for beginners. First you will need to find the plugin’s source file. Extract the theme package (zip file) which you have downloaded from your Themeforest account. You can find bundled plugins in the main theme folder in “plugins” folder. Next, you need to extract the plugin zip file on your computer.
Extracting the plugin zip file will create a new folder with the same name. This is the folder that you need to manually upload to your website using a FTP client.
You would need to access your host through the FTP manager. If you do not have your FTP username and password, then contact your WordPress hosting provider and ask them.
You need to download a FTP software to connect to your server. We suggest you to use Filezilla. It is a free software;
Open Filezilla on your computer and connect to your website using the login credentials provided by your web host. Once connected, you need to access the path /wp-content/plugins/
Next, upload the folder you extracted from the zip file to the /wp-content/plugins/ folder on your web server.
After uploading the files, you need to visit the WordPress admin area and click on the Plugins link in the admin menu. You will see your plugin successfully installed on the plugins page. You need to click on the Activate link below the plugin to activate the plugin.