Sketchup For Web Free Repack Link
This is the most common error for beginners. It happens when your edges do not form a closed loop.
Note: SketchUp Free is not the same as the 30-day trial of SketchUp Pro. For professional work (e.g., construction documents, CAD interoperability), consider SketchUp Pro or Studio. sketchup for web free
If you draw a new box touching an old box, they will "stick" together. This is the most common error for beginners