White Screens of Death on Mapped Domains

Most of my mapped domains are currently experiencing a w.s.o.d. I did turned on debug and the following came up.

Notice: Constant COOKIE_DOMAIN already defined in /home/stchosti/public_html/stchost.org/wp-content/plugins/domain-mapping/inc/sunrise.php on line 13

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /home/stchosti/public_html/stchost.org/wp-includes/functions.php on line 3457

Notice: Constant WP_MEMORY_LIMIT already defined in /home/stchosti/public_html/stchost.org/wp-config.php on line 124

Can you please advise? Thank you.