In a case you have issues with the Twitter displaying please check Twitter Stripe Shortcode Settings. Please make sure that your Twitter account has needed amount of tweets.
To remove Twitter API notification please add your own Twitter keys in Theme Settings – Elements – Custom Codes, there you can find 4 fields concerning Twitter functionality:
We recommend you to register new twitter API keys for your domain.
To generate new keys please proceed to https://dev.twitter.com/ and log in using your Twitter login data, then find Tools – Manage your apps and fill in the form.
Please see the screenshots below:
In case you won’t use Twitter on your site just please remove its shortcode from the content area: