Comments not work

You have to lok in inspector what error it shows. Also try to turn on debug mode and error reporting maximum while you are developing your site. This way you will see more error messages and it will be easier to identify problem.

The problem resolved itself. Thanks for your response. However, take this opportunity to ask if it is possible to add a comment to a vote on an article, as in The Joomla! Extensions Directory (see image).

Unfortunately it is not possible in Cobalt 7. Only in Cobalt 8 you can add ratings for every comment or review.