Countable error in Aegaeus php scripts

I’ve just noticed a new error in my WP dashboard that seems to originate from the php scripts in the Aegaeus theme of my site (2fc.com.au hosted on SiteGround).

The error is displayed at the the top of my WP dashboard for the site as follows:

Warning: count(): Parameter must be an array or an object that implements Countable in /home/xxxx/public_html/wp-content/themes/AegaeusWP/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /home/xxxx/public_html/wp-content/themes/AegaeusWP/admin/classes/class.options_machine.php on line 409

Warning: Cannot modify header information - headers already sent by (output started at /home/xxxx/public_html/wp-content/themes/AegaeusWP/admin/functions/functions.mediauploader.php:127) in /home/xxxx/public_html/wp-admin/includes/misc.php on line 1252

See also the attached screenshot image.

My actual WP site seems to working OK though.