Can you please make sure that you have properly configured Twitter in Sitefinity and have registered Twitter Application. Please refer to the following article for more details about this:
Configure Twitter in Sitefinity
You may also refer to the following article for more details about the Twitter feed widget.:
Twitter Feed widget
In addition to this, if you would like to display tweets on your Sitefinity website, you can also try to use the Twitter widget
. I am sending attached a short video for your convenience demonstrating this.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items