Story Templates are disabled by default, so an Admin or Owner will need to enable Story Templates for their Workspace. Admin and Owners can do this by going to Settings > Workspace Features > Story Templates:
Click on the slider to enable Story templates; the button will slide to the right and turn green to show that it is enabled.
Admin or Owners can disable the Story Templates feature by clicking on the slider again; the button will move to the left and turn gray.
Any Story Templates that exist before you disable the feature will be saved, although those Templates won’t be available for use until the feature is re-enabled.