A while ago, Deviantart changed the format of their links.
post #1445677 still uses the old link format in the Source field:
old link format --> new link format
https://glooh.deviantart.com/ --> https://www.deviantart.com/glooh
https://glooh.deviantart.com/art/Catgun-345258360 --> https://www.deviantart.com/glooh/art/Catgun-345258360
post #1609590 has a mix of both, because the e621-auto-source-thingy hasn't been updated:
https://www.deviantart.com/batri/art/table-474134283
https://batri.deviantart.com/
https://img00.deviantart.net/d3ad/i/2014/220/7/a/table_by_batri-d7uaccr.jpg
And if you search for https://www.deviantart.com/glooh in https://e621.net/artist/index
it won't find the artist because the URL stored in the artist wiki is https://glooh.deviantart.com/
Do we have to manually change all Deviantart URLs in artist wikis?
Updated by Blind Guardian