This error occurs when texture files are imported into Lightroom as presets.
If the files are jpegs then they are not Lightroom presets, they are textures (image files). Lightroom presets are processing formulas and have the file extension .lrtemplate.
If you want to import your Photomorphis textures into your Lightroom catalog just use the normal Lightroom import process.
If you're attempting to import presets, be sure the files have the correct file extension, and the Photomorphis product information page states they are Lightroom presets.
Related topic: How to import Lightroom presets.