Delete ACF repeater field row on Front End

You have 1 hardcoded as the row number in mon_action().

It should be delete_row( 'field_5c8fa4201b65f', (int) $_POST['param'], $post_id );

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)