FEAT #13694 TIME 0:30 add msg if bad url custom

src/core/controllers/AuthenticationController.php

src/frontend/app/login/login.component.ts

src/frontend/css/maarch-material-modal.scss

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts

src/frontend/plugins/modal/alert.component.html