After upgrading a client PC to .NET v4.8, deleting a record from a data grid (e.g. an Objective from the Audit Execution screen, or a file from the Attachments screen) can result in an error message:

Universal Time: (2019-09-18 12:01:57) Local Time: (2019-09-18 13:01:57) TimeZone: (01:00:00 DST)
Version: 5.3.0.12
EXCEPTION: TargetInvocationExceptionmessage: Exception has been thrown by the target of an invocation.
source: mscorlib
target: System.Object InvokeMethod(System.Object, System.Object[], System.Signature, Boolean)
stack: at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
 at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
 at System.Delegate.DynamicInvokeImpl(Object[] args)
 at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
 at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
EXCEPTION: InvalidOperationExceptionmessage: 'Selected' name cannot be found in the name scope of 'System.Windows.Controls.ControlTemplate'.
source: PresentationFramework
target: System.Windows.DependencyObject ResolveTargetName(System.String, System.Windows.Markup.INameScope, System.Windows.DependencyObject)

The error dialog box gives you the option to Continue, although it may sometimes be necessary to click the Refresh button afterwards.

This error results from a problem with a third-party component, affecting Ideagen Internal Audit (Aura) v5.3.0.12 and earlier.  The problem is corrected in v5.3.0.13, and v5.4 is unaffected.