Django forms.ValidationError 被500.html拦截怎么办？

Question

表单代码：

class UserCreationForm(forms.ModelForm):
    """A form for creating new users. Includes all the required
    fields, plus a repeated password."""
    password1 = forms.CharField(label='Password', widget=forms.PasswordInput, error_messages={'required':'密码不能为空'})
    password2 = forms.CharField(label='Password confirmation', widget=forms.PasswordInput, error_messages={'required':'密码不能为空'})

    class Meta:
        model = MyUser
        fields = ('user_name', 'password')

    def clean_password1(self):
        password1 = self.cleaned_data.get("password1")
        pattern = re.compile('^(?=.*?\d)(?=.*?[a-zA-Z]).{8,}$')
        if not pattern.match(password1):
            raise forms.ValidationError("密码过于简单，请至少8位，并且同时包含字母和数字")
            
        return password1

    def clean_password2(self):
        # Check that the two password entries match
        password1 = self.cleaned_data.get("password1")
        password2 = self.cleaned_data.get("password2")
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError("两次输入密码不一致")

        return password2

    def save(self, commit=True):
        # Save the provided password in hashed format
        user = super().save(commit=False)
        user.set_password(self.cleaned_data["password1"])
        if commit:
            user.save()
        return user

view.py:

def register(request):
    if request.method == 'POST':
        myuser_form = MyUserForm(data=request.POST)    

        if myuser_form.is_valid():
            user = myuser_form.save()
            user.save()
            return HttpResponseRedirect("/accounts/login/")
        else:
            print(myuser_form.errors)
                
    else:
        myuser_form = UserCreationForm()
    return render(request,'accounts/register.html',
                    {'form': myuser_form})

在debug模式下，能够正常运行，将error传递到前端页面，
但是当关掉debug，进入生产模式后，所有的forms.ValidationError全都被500.html拦截了，本来想在注册页面显示error提示，但现在全被500.html当成错误处理，这怎么办？