The following error occurs once iomanip is included：
MyClass.cpp.obj : error LNK2019: unresolved external symbol “void __cdecl std::_Xbad_alloc(void)” (?_Xbad_alloc@std@@YAXXZ) referenced in function “protected: void __cdecl std::time_get<char,class std::istreambuf_iterator<char,struct std::char_traits > >::_Getvals<wchar_t>(wchar_t,class std::_Locinfo const &)” (??$_Getvals@_W@?$time_get@DV?$istreambuf_iterator@DU?$char_traits@D@std@@@std@@@std@@IEAAX_WAEBV_Locinfo@1@@Z)
MyClass.cpp.obj : error LNK2001: unresolved external symbol _Mbrtowc
MyClass.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: struct _Cvtvec __cdecl std::_Locinfo::_Getcvt(void)const " (_imp?_Getcvt@_Locinfo@std@@QEBA?AU_Cvtvec@@anonymous_user_9674a66c) referenced in function “protected: void __cdecl std::time_get<char,class std::istreambuf_iterator<char,struct std::char_traits > >::_Getvals<wchar_t>(wchar_t,class std::_Locinfo const &)” (??$_Getvals@_W@?$time_get@DV?$istreambuf_iterator@DU?$char_traits@D@std@@@std@@@std@@IEAAX_WAEBV_Locinfo@1@@Z)
MyClass.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: unsigned short const * __cdecl std::_Locinfo::_W_Getdays(void)const " (_imp?_W_Getdays@_Locinfo@std@@QEBAPEBGXZ) referenced in function “protected: void __cdecl std::time_get<char,class std::istreambuf_iterator<char,struct std::char_traits > >::_Getvals<wchar_t>(wchar_t,class std::_Locinfo const &)” (??$_Getvals@_W@?$time_get@DV?$istreambuf_iterator@DU?$char_traits@D@std@@@std@@@std@@IEAAX_WAEBV_Locinfo@1@@Z)
MyClass.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: unsigned short const * __cdecl std::_Locinfo::_W_Getmonths(void)const " (_imp?_W_Getmonths@_Locinfo@std@@QEBAPEBGXZ) referenced in function “protected: void __cdecl std::time_get<char,class std::istreambuf_iterator<char,struct std::char_traits > >::_Getvals<wchar_t>(wchar_t,class std::_Locinfo const &)” (??$_Getvals@_W@?$time_get@DV?$istreambuf_iterator@DU?$char_traits@D@std@@@std@@@std@@IEAAX_WAEBV_Locinfo@1@@Z)
D:\Documents\Unreal\MyProject\Binaries\Win64\UnrealEditor-MyProject.patch_9.exe : fatal error LNK1120: 5 unresolved externals