Inheritance security rules violated by type error after upgrade

Hi,

After upgrading UiPath one of our processes produces the following error upon opening. All of the processes within this project also now appear as blank:

23.10.4+Branch.support-v23.10.Sha.8567215fe1303e230aedf0a4b2fe0be25bb57ca8

Inheritance security rules violated by type: ‘NPOI.OpenXml4Net.Util.ZipInputStreamZipEntrySource+FakeZipEntry’. Derived types must either match the security accessibility of the base type or be less accessible.

Error: System.Exception: Inheritance security rules violated by type: ‘NPOI.OpenXml4Net.Util.ZipInputStreamZipEntrySource+FakeZipEntry’. Derived types must either match the security accessibility of the base type or be less accessible.
at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes)
at System.Reflection.RuntimeAssembly.GetExportedTypes()
at System.Activities.Presentation.View.ImportDesigner.GetUniqueNamespacesInAssembly(Assembly assembly, AssemblyContextControlItem assemblyContextItem)
at System.Activities.Presentation.View.ImportDesigner.UpdateAvailableNamespaces(Assembly assembly, AssemblyContextControlItem assemblyContextItem)
at System.Activities.Presentation.View.ImportDesigner.GetAvailableNamespaces()
at System.Activities.Presentation.View.ImportDesigner.OnContextChanged()
at System.Activities.Presentation.View.ImportDesigner.OnContextChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
at System.Windows.Data.BindingExpression.Activate(Object item)
at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Run(Object arg)
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), HResult -2146233054

Any ideas how this could be remedied please?

Cheers,
T

2024-04-29_15-46-16