Importing Preset Failing on Lightroom

[Jonnie5E56]

I've followed the steps on how to import the .dng file to get the preset onto my mobile app but it just fails every time. What am I doing wrong here? 
 Any help appreciated. 

[Rob_Cullen]

We need to understand that the DNG is an Image file that contains the Preset metadata.

So we need to [Add] the Image.DNG to the library, 'open' the image in 'edit' mode, and then immediately Create a Preset (that uses the metadata about the Preset edit adjustments).

You might find more info here-

https://stayclosetravelfar.com/how-to-install-lightroom-mobile-presets/