The legacy Fawn can only be found on Nexus, the version of the legacy Fawn is 1.6.

The remastered Fawn has completely updated art and an updated animation file, the version of the remastered Fawn is 1.8+

Only one version of The Fawn can be enabled at a time, DO NOT ENABLE BOTH.

THESE PALETTES ARE NOT AND WILL NOT BE COMPATIBLE WITH 1.8+
before posting any comments make absolutely sure you are using a manual install of 1.6 and that the Steam WS Fawn 1.8+ is disabled.

I have cross checked the files of 1.6 with my palettes and can confirm it works just as it should.

In order to manually install simply navigate to */Steam/steamapps/common/DarkestDungeon/mods
then extract the mod you want into it's own folder, make sure that there's a project.xml and a preview icon in said mods folder.
ex:*\Steam\Steamapps\common\DarkestDungeon\mods\Legacy Fawn
within the Legacy Fawn folder should be the classes files, project.xml, and the preview icon.

If you need further explanation I suggest finding a guide, otherwise I'll try to answer questions to the best of my ability.