enable_if.h:26:78: error: no type named 'type' in 'std::enable_if<false>'; 'enable_if' cannot be used to disable this declaration
template <bool _Bp, class _Tp = void> using enable_if_t = typename enable_if<_Bp, _Tp>::type;
                                                                             ^~~
multi_threaded_common.h:155:34: note: in instantiation of template type alias 'enable_if_t' requested here
        template<typename = std::enable_if_t<!std::is_same_v<ConvertibleFrom, void>>>
                                 ^
[snip]