It's happening a lot, both in this official community and in other communities. People are talking every day about encountering errors where the test screen turns white. We know this error is due to improper expansion with a lack of defined height, causing a RenderFlex error.
However, most of the time, those reporting these errors are people who are just getting to know the tool and become frustrated because it gives the impression that it's a tool error and not a construction error they made. Please consider the possibility of alerting this error beforehand, as is already done in other occasions when we try to draw a layout that is not allowed, and it returns the action.