Why do I get the error: RenderBox was not laid out: RenderViewport#a3518 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE

Question

I constantly get this error: " RenderBox was not laid out: RenderViewport#a3518 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE \'package:flutter/src/rendering/