cannot resolve overloaded function based on conversion to type

I'm pretty new to C++ template programming. I'd like to design a function element such as e.g.

1. element<3, 3, 3, 3, 3> will return 3

2. element<3, 3, 2> will fail an assertion

   #include <iostream>
   #include <cstdlib>
   
   namespace meta
   {       
     template<typename T>
     constexpr T element(T x)
     {
       return x;
     }
   
     template<typename T, typename... Ts>
     constexpr T element(T x, Ts... xs)
     {
       constexpr T oth = element(xs...);
       static_assert(oth == x, "element Mismatch");
       return x;
     }
   
     template<int... DIMS>
     void get_elements()
     {
       std::cout << "elements " << element(DIMS...);
     }
   }
   
   int main(int argc, char ** argv)
   {
     static constexpr int D1 = 3, D2 = 3;
   
     meta::foo<D1, D2>();
   }
   
   

But GCC with std=c++14 is failing with

cannot resolve overloaded function ‘element’ based on conversion to type ‘int’ E = meta::element<D1, D2>; ^

I'd like to exploit recursion to perform an equality check on each template argument in the list, and return one of them if they're all equal.