If you use any Argonian texture that changes the textures to not match with the vanilla UV mapping then the loading screens with argonians in it will have messed up tail textures, this "fixes" it.

The way I did is to just download Kartoffel's SSEUT - Actors module and then isolate the argonian textures into a folder named "LoadScreenFix", and then proceed to edit the texture paths of the two loading screen meshes that have argonians in it (that I know of, If you know any extra I'll gladly add it to this fix) and then change the texture paths to the textures found inside the LoadScreenFix folder.

Beware that it won't match with your Argonian textures (i.e Flawn's) but at least you won't have to endure seeing the tails with messed up textures due to the UV mapping.