Ng build --prod fails

Ionic Framework
1

When I run ng build or ng serve everything goes well but ng build --prod just goes bad
Some output

src/app/das orhboard/cotizaciones/add/add.page.html:179:9 - error NG8001: 'ion-column' is not a known element:
1. If 'ion-column' is an Angular component, then verify that it is part of this module.
'@NgModule.schemas' of this component to suppress this message.
179         <ion-column>
            ~~~~~~~~~~~~

  src/app/dashboard/cotizaciones/add/add.page.ts:22:16
    22   templateUrl: './add.page.html',
                      ~~~~~~~~~~~~~~~~~
    Error occurs in the template of component AddPage.

[ERROR] An error occurred while running subprocess ng.