I saw some people post pictures on the discussion but wondering how to do it?
NO! Don't post this in Troubleshooting. Troubleshooting is only for reporting glitches! And to post a picture, just do ! with the picture URL inside the brackets.
It says you posted this discussion one year ago. Did you recently move it to the troubleshooting section?
I don't know the answer but I bet you would get more replies if you posted this to troubleshooting or just Duolingo rather than French.