Proposed resolution:

This wording is relative to N4910.

1. Modify [range.chunk.view.input] as indicated:

   namespace std::ranges {
     […]
    
     template<view V>
       requires input_range<V>
     class chunk_view : public view_interface<chunk_view<V>> {
       V base_ = V();                                        // exposition only
       range_difference_t<V> n_ = 0;                         // exposition only
       range_difference_t<V> remainder_ = 0;                 // exposition only
       […]
     public:
       chunk_view() requires default_initializable<V> = default;
       constexpr explicit chunk_view(V base, range_difference_t<V> n);
       […]
     };
     […]
   }
   

2. Modify [range.chunk.view.fwd] as indicated:

   namespace std::ranges {
     template<view V>
       requires forward_range<V>
     class chunk_view<V> : public view_interface<chunk_view<V>> {
       V base_ = V();                   // exposition only
       range_difference_t<V> n_ = 0;    // exposition only
       […]
     public:
       chunk_view() requires default_initializable<V> = default;
       constexpr explicit chunk_view(V base, range_difference_t<V> n);
   
       […]
     };
   }
   

3. Modify [range.slide.view] as indicated:

   namespace std::ranges {
     […]
   
     template<forward_range V>
       requires view<V>
     class slide_view : public view_interface<slide_view<V>> {
       V base_ = V();                      // exposition only
       range_difference_t<V> n_ = 0;       // exposition only
       […]
     public:
       slide_view() requires default_initializable<V> = default;
       constexpr explicit slide_view(V base, range_difference_t<V> n);
   
       […]
     };
     […]
   }