In ArcGIS Online 3.10, the Time Slider widget does not configure according to the documentation.
Last Published: March 11, 2016ArcGIS Online
Bug ID Number
November 24, 2015
September 22, 2022
The bug has been fixed. See the Version Fixed and Additional Information, if applicable, for more information.
If the organization account already has a pre-3.10 application with the Time Slider widget configured, create a copy of the application with ago-assistant, and reconfigure the application with the time slider staying in place.