Bom dia, tudo bem?
Depois de inserir o CardView o componente ficou com esse alerta de erro e nao aparece os atributos, segue abaixo o erro.
This view is not constrained vertically: at runtime it will jump to the top unless you add a vertical constraint The layout editor allows you to place widgets anywhere on the canvas, and it records the current position with designtime attributes (such as layout_editor_absoluteX). These attributes are not applied at runtime, so if you push your layout on a device, the widgets may appear in a different location than shown in the editor. To fix this, make sure a widget has both horizontal and vertical constraints by dragging from the edge connections. Issue id: MissingConstraints.
Poderia me indicar o que pode ser?
Obrigado