Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type BorrowItems.VisualWebPart1.VisualWebPart1, BorrowItems, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ef2e00d0e380db5a could not be found or it is not registered as safe. Correlation ID: 00f466a1-5816-b05a-5101-39133a0d2ba2.

Error Details:
[UnsafeControlException: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type BorrowItems.VisualWebPart1.VisualWebPart1, BorrowItems, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ef2e00d0e380db5a 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)