Debug Errors with 4.3 Upgrade

Thanks @gouravwptech, I also found that thread and had just fixed it.

But it needs to be fixed with a theme update from the theme authors.

There are only two lines that are causing the error and the fix is simple:

In
/cwp-megaresponsive/widgets/banner-widget/banner-widget.php

The line
parent::__construct('CWP_Add_banner', 'CWP - Add banner', $widget_ops);
has to be changed to
parent::__construct('CWP_Add_banner', 'CWP_Add_banner', $widget_ops);

and in
/cwp-megaresponsive/widgets/facebook-like-box/fb-like-box.php

The line
$this->WP_Widget('CWP_FB_Like_Box', 'CWP - Facebook like box', $widget_ops);
has to be changed to
parent::__construct('CWP_FB_Like_Box', 'CWP - Facebook like box', $widget_ops);