Trying David's suggestion...
Thanks for trying, David, but still doesn't work. I can't even get as far as being able to refresh the page. As soon as I click 'open' to upload a file from my computer, I get the error message. Even tried a refresh after the error message, but it didn't do anything. At this point I am completely unable to upload an image from my computer.
Don't know if this is connected, but when I sign in my user name is showing as 'famico', when it should be 'Hosteen Yendikeno'.
Edited to add that, even though I am separating my post into paragraphs, once uploaded to the forum, the formatting disappears. I could live with that, if only I can post images.