Feedburner Plugin error The feed does not have subscriptions by email enabled

I have activated the Feedburner subscription, however when I hit the subscribe button this error displays, “The feed does not have subscriptions by email enabled”. You can even watch the video I posted about the problem I’m experiencing. Help would be appreciated.

https://www.youtube.com/watch?v=IsyrwjdCNV0

https://www.ads-software.com/plugins/feedburner-email-subscription/