What's wrong with sololearn new update

Question

Where I try to mark someone's answer on my question as the best I keep telling me no connection while there is connection and I can't comment on a lesson only in the lesson's executive what's wrong??

Answer 1

https://www.sololearn.com/Discuss/2706959/?ref=app

https://www.sololearn.com/Discuss/1618271/?ref=app