It is important to note that if you are using multisite license the widget templates are not automatically shared between the different sites and you need to share each template manually. To do this you need to switch to the main/default site from the multisite drop-down and then go to Design->Widget templates
. If you can see the templates there, you need to click on their Actions
link and click on Share with...
in order to share the templates with the other sites in the project.
Please also refer to the following article for more details about sharing widget templates:
Share widget templates
Can you please make sure that you have shared the widget templates?
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