Freemius prevents activation of WP Mobile Menu

Any suggestions why the follow fatal error occurs when attempting activation of WP Mobile Menu – How could this be resolved please?

Fatal error: Uncaught TypeError: Argument 1 passed to Freemius::get_api_user_scope_by_user() must be an instance of FS_User, bool given, called in /home/customer/www/stuartd16.sg-host.com/public_html/wp-content/plugins/menu-image/freemius/includes/class-freemius.php on line 22695 and defined in /home/customer/www/stuartd16.sg-host.com/public_html/wp-content/plugins/menu-image/freemius/includes/class-freemius.php:22709 Stack trace: #0 /home/customer/www/stuartd16.sg-host.com/public_html/wp-content/plugins/menu-image/freemius/includes/class-freemius.php(22695): Freemius->get_api_user_scope_by_user(false) #1 /home/customer/www/stuartd16.sg-host.com/public_html/wp-content/plugins/menu-image/freemius/includes/class-freemius.php(22734): Freemius->get_api_user_scope(false) #2 /home/customer/www/stuartd16.sg-host.com/public_html/wp-content/plugins/menu-image/freemius/includes/class-freemius.php(19625): Freemius->get_current_or_network_user_api_scope() #3 /home/customer/www/stuartd16.sg-host.com/public_html/wp-content/plugins/menu in /home/customer/www/stuartd16.sg-host.com/public_html/wp-content/plugins/menu-image/freemius/includes/class-freemius.php on line 22709

The page I need help with: [log in to see the link]