Imgur uploading is currently off-line: Intermittent Failed to upload image; imgur is rejecting the request
Many answers are rather dependent on being able to include images; is there an alternative host to use while this problem persists?
I know that Imgur is out of the control of Stack Exchange; this question is not a duplicate of the one linked. I am not asking for Stack Exchange to look into or try to fix the problem.
Incidentally https://imgbb.com also appears to be down at the moment. That is the #2 result on a Google search for "image host."
It seems that postimg.org is working for the time being: