My images in Lay Out are gray squares with red crosses. I can’t get them back. Also when I paste images in again this happens. What can I do with this?
What are you copying? Are they raster images or are you copying from SketchUp? Where are the originals you are copying located? Copying from one application and pasting into another is problematic because there is no reference back to the original file. What you describe with the gray squares and red Xs is typical when the reference is lost. Instead of copying and pasting you should be using File>Insert. The original references should be kept in a folder on your local, internal drive and not in the cloud. When you insert the image or SketchUp file into LayOut a reference link to the original is created. Also, a SketchUp file should only be inserted into the LayOut file once. After the file is inserted you can copy the viewport within layout.
Basically, use the correct workflow and you shouldn’t have any problems.