Thanks for the tips. None of the above worked.
However, here’s where I found the ability to Save:
Appearance | Widgets | Primary Widget Area | Rotating Tweets
Upgraded to WordPress 4.5. Still the same.
The site was put together by someone else no longer available. Getting up to speed on it.
Am NOT seeing save buttons for other widgets in this area:
Appearance | Customize | Widgets | Rotating Tweets
Did upgrade the rotating tweets plugin to latest and it is pulling current tweets, but from the default timeline. Need to change to a search.
Thanks for the response.
Have not yet upgraded WordPress to 4.5. Wanting to solve one thing at a time.