Error

Hi, I installed Rank Math and activated it. but when I go to the setup wizard I get these Errors:

Warning: Invalid argument supplied for foreach() in /home/customer/www/therapyinplay.com/public_html/wp-content/plugins/simple-author-box/freemius/includes/managers/class-fs-admin-menu-manager.php on line 557

Warning: Cannot modify header information – headers already sent by (output started at /home/customer/www/therapyinplay.com/public_html/wp-content/plugins/simple-author-box/freemius/includes/managers/class-fs-admin-menu-manager.php:557) in /home/customer/www/therapyinplay.com/public_html/wp-admin/includes/misc.php on line 1310

Im new to all this and don’t understand the issue. Thanks for any help you can provide will be appreciated.