System.MethodAccessException: Attempt by method 'MS.Utility.FrugalStructList`1<T>.Add(!0)' to access method 'MS.Utility.SingleItemList`1<T>.SetCount(Int32)' failed.
   at `1.Add(T value)
   at System.Windows.StyleHelper.AddContainerDependent(DependencyProperty dp, Boolean fromVisualTrigger, FrugalStructList`1& containerDependents)

A Microsoft function, fails to call another Microsoft function, from inside Microsofts own code.

I don't know what to do about this. I have neither access to the failing code, nor the ability to fix it.

But the Launcher works for almost all other players, so.. it must be something specific to your System.