The Ultimate Branding plugin is starting to make errors.

The Ultimate Branding plugin is starting to make errors.
https://screencast.com/t/mLw0qHm94

The Help tab do this:
Notice: Trying to get property of non-object in /nas/content/live/simplylearn02/wp-includes/query.php on line 781

Notice: is_singular was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. Please see Debugging in WordPress for more information. (This message was added in version 3.1.0.) in /nas/content/live/simplylearn02/wp-includes/functions.php on line 4137

Notice: Trying to get property of non-object in /nas/content/live/simplylearn02/wp-includes/query.php on line 781

Custom E-mail From Headers makes this error when you like so make new user on the wordpress:

Fatal error: Uncaught phpmailerException: Invalid address: (setFrom) in /nas/content/staging/simplylearn02/wp-includes/class-phpmailer.php:1023 Stack trace: #0 /nas/content/staging/simplylearn02/wp-includes/pluggable.php(352): PHPMailer->setFrom('', '', false) #1 /nas/content/staging/simplylearn02/wp-admin/user-new.php(100): wp_mail('xtremefreelance...', '[SimplyLearn.no...', 'Hi,\n\nYou've bee...') #2 {main} thrown in /nas/content/staging/simplylearn02/wp-includes/class-phpmailer.php on line 1023