Error

Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type SFS.Intranet.TwitterFeed.WebParts.TwitterTimeLine.TwitterTimeLine, SFS.Intranet.TwitterFeed, Version=1.0.0.0, Culture=neutral, PublicKeyToken=44273a27494585cc could not be found or it is not registered as safe. Correlation ID: 80a2fd9e-3135-6092-9109-90c6865ede87.

Error Details:
[UnsafeControlException: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type SFS.Intranet.TwitterFeed.WebParts.TwitterTimeLine.TwitterTimeLine, SFS.Intranet.TwitterFeed, Version=1.0.0.0, Culture=neutral, PublicKeyToken=44273a27494585cc could not be found or it is not registered as safe.]
  at Microsoft.SharePoint.ApplicationRuntime.SafeControls.GetTypeFromGuid(Boolean isAppWeb, Guid guid, Guid solutionId, Nullable`1 solutionWebId, String assemblyFullName, String typeFullName, Boolean throwIfNotSafe)
  at Microsoft.SharePoint.WebPartPages.SPWebPartManager.CreateWebPartsFromRowSetData(Boolean onlyInitializeClosedWebParts)