The solution is simple. Take the included folder named “instagram-theatre” and upload it to your wp-content/plugins directory of your Wordpress install.

Also, please check to make sure the plugin folder has the appropriate permissions. This is a common issue that people are having with their Wordpress installs. The parent folder should be readable by the world (i.e. 775).

There are a number of free tools available online to retrieve this. Here is one:

Instagram Token