Image size warning

When I import images from LR Classic, the following message appears:

Image size warning
Adobe Lightroom Classic provides the images in a reduced size.
To fix the problem, switch to Lightroom Classic and select the menu command Library > Previews > Create 1:1 Previews.

Are the images too big or too small?
What should I do

This message indicates that the image that images that Lightroom created for FotoMagico are smaller than the originals. If you want the full size images in FotoMagico, you need to tell Lightroom to create 1:1 previews.