C++ : Error while deducing types for templated function

I am trying to play around with type deduction in templates in c++. I am experimenting with type deduction for array arguments, with the following code:

template <typename T, std::size_t N>
constexpr std::size_t func(T (&)[N]) {
    return N;
}

This will simply return the length of the input array, Like So:

char arr[] = "abc";
cout << func(arr) << endl; // would print 3.

But when I modify the code of func to have an argument name, all hell is breaking loose!

template <typename T, std::size_t N>
constexpr std::size_t func(T (&)[N] arr) {
    return N;
}

The main error I am getting seems to be this : Severity Code Description Project File Line Suppression State Error (active) E1097 unknown attribute "no_init_all" ProjectName C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\um\winnt.h 7597

Any Idea on what this issue is? and how to resolve it?

Clearly I don't need to declare the name for the parameter since I don't need to use it in this function, but just wondering why this error is popping up!