Comments No Longer Appear on Posts

I had the same problem and changed comments.php in my child theme. In line 35 it says
<?php wp_list_comments( array( 'callback' => 'bavotasan_comment' ) ); ?>
I changed this to:
<?php wp_list_comments(); ?>
now my comments are back.

Lucille85… thank you so much. That did the trick!!

Great ??

I had the same Problem. This might be relevant to you.
https://wordpress.stackexchange.com/questions/375956/comments-invisible-after-moving-wordpress-to-new-server-while-commenting-still