For the Instagram feed JS module to work properly, you need an Instagram ID for the account you want to show. Not only do you need the ID but also an Instagram Token.
To obtain a token, you can go to this article - Instagram feed module
To get the Instagram ID you need to go to this website:
If you have both, you are set to go and you can use the Instagram modules that we offer. Note, this is not because we made this, but because Instagram requires this. If for some reason any of the URL's we provide do not work, you can simply google 'get Instagram id'
Paste the tokens and ID's in its appropriate fields. If you do not, the module will not work, and you will get an error.