Program stops after exception handling

lab9.exe has stopped working.A problem has occurred and the program is no longer working properly.
The program will be closed and Windows will notify you if there is a solution.

#ifndef LAB9_LIST_H
#define LAB9_LIST_H

# include <string>
# include <exception>
using std::string;

class list_error:public std::exception {
private:
    US>string errorMessage;
public:
    list_error(string errorMessage=""): errorMessage(errorMessage){}
    virtual~list_error(){}
    virtual const char * what() const noxcept override
    {
        return errorMessage.c_str();
    }

};

template<typename T>
class Link
{
private:
    T value;
    Link*next;
public:
    // constructor
    Link(T value, Link*next=nullptr): value(value), next(next){}
    // destructor
    virtual~Link(){}
    // return value
    T getValue() const {return this ->value;}
    // return next
    Link*getNext()const {return this->next;}
    // set next
    void setNext(Link*next) {this->next=next;}
};



template<typename T>
class list
{
private:
    Link <T>*head;


public:
    List():head(nullptr){}


    T getHead()
    {
        //throw exception
        if(head==nullptr)
        {
            row list_error("no link in the list");
        }
        return head ->getValue();
    }
}

#include<iostream>
# include "List.h"

using std::cout;
using std::endl;


int main()
{

    List <int>intList;

    // testing exception
    try{
        cout<<intList.getHead()<endl;
        cout<<"Should have had an exception."<endl;
    }
    catch(list_error&ex){
        cout<<"List error saying"<<ex.what()<<endl;
    }
    catch(...){
        cout<<"Cough something else"<<endl;
    }

    return 0;
}