Answered Adding avatar doesn't work

I try to add an avatar.
I go to my Personal Details.
I go click on the avatar:


I then see


I then select an image from my hard drive (dimensions 600x576, 490kB)

For a second after I add it, I see a loading animation in the top right corner. But after that, nothing changes.

If I press Okay, nothing happens. If I press Close, nothing is saved.

Is there a (very small) file size or dimension limit that it's not telling me about? All it's telling me is the image has to be at least 200x200 pixels (which mine exceeds handily).

 

Exactly the same with


EDIT:
Nothing changes even if I made the image smaller than 200 x 200 (tried 198 x 190).

 

Now I see a response at least:

Ended up having to go all the way down to 50 x 57 to get it to upload.

EDIT: Anyway, it's odd that a) I don't see the message about the size constraint on Google Chrome and b) there's no mention of a size limit anywhere else other than the "at least 200 x 200" comment which clearly doesn't even hold.
But in any case thanks for the help.