• I have had the same situation, @fabien (and the same error message). I now copy my message before submitting, and when I see the error, I paste my text into the next box and submit. Pain in the rear, but doable. Until you said something, I thought I was the only one seeing this.

  • @fabien,

    This is the only message that I see you have posted. Look in your profile activity and you will see your messages. Make 100% sure that your message is actually posted. I have seen that I need to hit the back button and try again before the posting actually “takes”.