The error states
that you are missing some
kind of reference thus it fails to initialize properly. If it does not
initialize properly it will not be able to load its localization resources.
Please revert back any changes you have made to the site.
You have to replace the news tag in the system.config with this one:
Also you have to remove the page from the backend pages administration.
the Telerik team
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 Public Issue Tracking
system and vote to affect the priority of the items