Powder Toy compile errors

Error	4	error LNK2019: unresolved external symbol "public: __thiscall SaveIDMessage::SaveIDMessage(int)" (??0SaveIDMessage@@QAE@H@Z) referenced in function "public: void __thiscall ServerSaveActivity::saveUpload(void)" (?saveUpload@ServerSaveActivity@@QAEXXZ)	C:\Users\Trevor\Documents\Mythical Mod\ServerSaveActivity.obj	Mythical Mod

Error	3	error LNK2019: unresolved external symbol "public: __thiscall ui::CopyTextButton::CopyTextButton(struct ui::Point,struct ui::Point,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class ui::Label *)" (??0CopyTextButton@ui@@QAE@UPoint@1@0V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PAVLabel@1@@Z) referenced in function "public: void __thiscall PreviewView::AttachController(class PreviewController *)" (?AttachController@PreviewView@@QAEXPAVPreviewController@@@Z)	C:\Users\Trevor\Documents\Mythical Mod\PreviewView.obj	Mythical Mod