Open Live Write is currently unable to post images to Blogger. An error 400 appears when posting. I’m not the only one having the issue as evidenced here:
https://github.com/OpenLiveWriter/OpenLiveWriter/issues/786
and on Google
https://productforums.google.com/forum/#!topic/blogger/nJbedfynH7o
Appears to be an issue with the Google side of things.
Hopefully, we can get someone to look at this so I won’t to keep using sign language here!