Critical Update affecting Case Flags - January 2020
On January 3, 2020, Salesforce is pushing out a critical update called "Require Customize Application Permission for Direct Read Access to Custom Settings," which will directly impact Visualforce pages and Lightning Components that make references to custom settings. This change impacts explicitly Case Flags (version 4.67 or older), where direct references exist between the Case Flags Lightning Component and Case Flags custom settings.