Invisible blocks

If while walking through your build you notice an invisible block or you can see its outline but cannot see the block, you can fix it by placing a block next to it. If not, use the middle mouse button on gamemode 1 to select the block, break it and replace it. Usually this problem appears with world files (when trying to import them to the server) to avoid using this problem instead, the outline.

Good to know: You can create a support ticket, describe your problem and, send proof of purchase so that you can be provided with the correct and repaired world