Trending Issue

We received several reports that the RSS web part is broken after installing December 2020 CU. This affects the SharePoint versions 2010, 2013, 2016 and 2019. The error in the UI and ULS log is similar to the following: RssWebPart: Exception handed to HandleRuntimeException.HandleException System.ArgumentNullException: Value cannot be null. Parameter name: key at Microsoft.SharePoint.WebControls.CacheObject.LoadDataFromCache(String key) […]