Deprecated: Assigning the return value of new by reference -path- scheduled-content.php on line 449

Deprecated: Assigning the return value of new by reference is deprecated in /wp-content/plugins/scheduled-content/scheduled-content.php on line 449

$sc = &new ScheduledContent();

The above message started yesterday, after updating other plugins! Among a few other massages.
How can I solve this myself in the future?