- Make sure all the children of the Card component are of type CardItem or CardSection.
- Take into account that CardItems are intended to hold only one child while making layout management easier (use it as you would use a [StackItem](https://developer.microsoft.com/en-us/fluentui#/components/stack)).
- Take into account that CardSections are intended to hold multiple children while making layout management easier (use it as you would use a [Stack](https://developer.microsoft.com/en-us/fluentui#/components/stack)).