wp_schedule_event – function won’t execute

add_action('opbs_update_counts', array('cronTaskUpdateCounts'));

should be

add_action( 'opbs_update_counts', array( $this, 'cronTaskUpdateCounts' ) );

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