Coverlet Instrument fails to resolve WindowsBase.dll namespace

[skerr0]

I require some help figuring out what might be going on with a module which is failing to instrument. The assembly in question is a net48 WPF application. There is some Fody generated code for handling property changes. The namespace causing the issue is a part of the WindowsBase.dll assembly.

I cannot make sense of why this would be failing. Any information would be appriciated.

Unable to instrument module: .\Application.WPFTests\bin\debug\net48\Application.WPF.exe Mono.Cecil.ResolutionException: Failed to resolve System.Windows.Threading.DispatcherPriority at Mono.Cecil.Mixin.CheckedResolve(TypeReference self) at Mono.Cecil.MetadataBuilder.GetConstantType(TypeReference constant_type, Object constant) at Mono.Cecil.MetadataBuilder.AddConstant(IConstantProvider owner, TypeReference type) at Mono.Cecil.MetadataBuilder.AddParameter(UInt16 sequence, ParameterDefinition parameter, ParamTable table) at Mono.Cecil.MetadataBuilder.AddParameters(MethodDefinition method) at Mono.Cecil.MetadataBuilder.AddMethod(MethodDefinition method) at Mono.Cecil.MetadataBuilder.AddMethods(TypeDefinition type) at Mono.Cecil.MetadataBuilder.AddType(TypeDefinition type) at Mono.Cecil.MetadataBuilder.AddTypes() at Mono.Cecil.MetadataBuilder.BuildTypes() at Mono.Cecil.MetadataBuilder.BuildModule() at Mono.Cecil.MetadataBuilder.BuildMetadata() at Mono.Cecil.ModuleWriter.<>c.<BuildMetadata>b__2_0(MetadataBuilder builder, MetadataReader _) at Mono.Cecil.ModuleDefinition.Read[TItem,TRet](TItem item, Func3 read)
at Mono.Cecil.ModuleWriter.BuildMetadata(ModuleDefinition module, MetadataBuilder metadata)
at Mono.Cecil.ModuleWriter.Write(ModuleDefinition module, Disposable1 stream, WriterParameters parameters) at Mono.Cecil.ModuleWriter.WriteModule(ModuleDefinition module, Disposable1 stream, WriterParameters parameters)
at Mono.Cecil.ModuleDefinition.Write(Stream stream, WriterParameters parameters)
at Coverlet.Core.Instrumentation.Instrumenter.InstrumentModule() in //src/coverlet.core/Instrumentation/Instrumenter.cs:line 325
at Coverlet.Core.Instrumentation.Instrumenter.Instrument() in //src/coverlet.core/Instrumentation/Instrumenter.cs:line 148
at Coverlet.Core.Coverage.PrepareModules() in /_/src/coverlet.core/Coverage.cs:line 135`