I have tried to post something including an uploaded photo. The photo has been uploaded successfully, however posting was not possible. The system asked me to correct the highlighted fields, but nothing was highlighted. Then I deleted the photo and I could immediately post successfully. Please take a look at it.
With regards to the error message you have got, I have forwarded this to the right department. I will keep you updated if there is anything I need to share with you. As the temporary solution, I have put the image in your post earlier. So your post looks fine now.
Thank you for bringing this to us. Hope this was helpful for you.