You have mapped the external template - ListPageMaster or NewsViewControlDesigner through App_Data/Configuration/Telerik.Sitefinity.Configuration.ControlsConfig.xml or you have set the public property of NewsView control - ItemListTemplatePath to this location ~/Sitefinity/ControlTemplates/News/ListPageMaster.ascx".
Currently the control is looking for its external template, but it is not locates inside ~/Sitefinity/ControlTemplates/News/ and you get an error. There are two options
1.Remove the mapping
2. Add the external template ( you can get all templates from your account >> Downloads section) in the location you have set.
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