unable to clone some .FCStd-files (rather a github problem?)

[merauch]

I am really interested in quickly looking at the freecad files of the optics of the medjed project for inspiration for a homebrew MLA setup for my lab. Thank you for providing all the input!
However, not all files download when I run git-annex get . and git annex get /home/gideong/Downloads/medjed/medjed-assembly/optics/*.FCStd and I am presented with the error as in the screenshot below.

The command git remote add 54ac5784-fe31-4c83-b8f7-a8cbf231f520 -- nemoa@DESKTOP-3A6Q8ON:D:\code\openMLA-org\medjed-system\assembly produces no output.
Having never worked with annex before and still not understanding the whole of git(hub) itself, I myself surely am the cause of this problem but here one might be able to help me faster and more specifically.
I am working with Manjaro Linux fully updated.
Thank you very much in advance!