fixed for Orion v3.6.1, horray!
For those who are interested in modding Stellaris, I think it was since the Overlord DLC came out, that in the gfx/portraits/portraits folder in the portraits.txt files, the old hair_selector = "file directory" lines were renamed, all I did was open all portraits.txt files at once in notepad and used the replace tool to change hair_selector into attachment_selector in all files in one click and that did the trick. For some races that actually have different hair options in game that option is now called attachments instead of hair but idc.

The greatest hassle was actually updating this here workshop page to use the new files. In the Stellaris launcher in the "UPLOAD MOD" tab I copied in the mod id that was already in use to not unneccessarily create a new workshop page, but it gave me an error - "A local mod with the same remote id already exists." so I deleted my local files and folders of that one mod in Drive:\Users\User\Documents\Paradox Interactive\Stellaris\mod\ and unsubscribed from the workshop item, yet the error still persisted.
What you have to do since a recent update is also delete the Drive:\Users\User\Documents\Paradox Interactive\Stellaris\launcher-v2.sqlite file and maybe another one, for more information visit this page, kudos to AndrewT, wouldn´t have found out myself:
https://forum.paradoxplaza.com/forum/threads/cant-update-my-mod-remote-id-already-exists.1544353/