This just started happening a few days ago.
This issue happens on Tumblr.
I tried searching up solutions for this famous errors,
but Google comes up with sites trying to get you to download something,
or repeat the same solutions (that don't work for me) on various websites. :$
What usually happens is,
it works after minutes of waiting,
then after a while on Tumblr,
its back to the 404 error. -_-
Any solutions?
Thanks a lot! (: