There has been a guy waiting for a few days then reported the same problem on Matrix on Sep. 9th:
(begin of quote)
@linklinking:kemono.su
I tried to import a new patreon creator I just subbed to, all posts were received and are found in /posts, but the patreon creator itself isn't. Any re-import skipps these known posts and the creator ID they are under returns 404 - Creator not found. It's been like that for a few days. Is there a way to fix that by me with the importer?
That's where the posts should be found under
https://kemono.cr/patreon/user/163083062(end of quote)
And if you click on that link right now you'll see it's still "not found". Is this really just a cache problem (which did't get updated for more than at least a week?) or is there something wrong?