Thanks. Spine doesn't load images outside the images path. You can't use an attachment path like ../Assets/etc to load an image outside the images path. You could set your images path to ../../../ then use the attachment name like:
Assets/Resources/Animation/Character/Soul/Skin/Sets/Basic/BluntBasic
To do this you likely need to rename your existing attachments. To do that easily, you can use Find and Replace:
Tree - Spine User Guide: Find and Replace
An alternative might be to create a symlink in your images folder that points to a folder outside the images folder. On Windows that is done using mklink /J pathToLink pathToExternalImagesDir.
