Plugin apresenta erro grave

Olá,

O plugin está gerando o seguinte erro no website:

Fatal error: Uncaught Error: Cannot use object of type WP_Error as array in /home/.../public_html/wp-content/plugins/sac-digital-popup/public/class-sac-digital-popup-public.php:117 

Stack trace: 

#0 /home/.../public_html/wp-content/plugins/sac-digital-popup/public/class-sac-digital-popup-public.php(75): Sac_Digital_Popup_Public->generateToken('0000z0000-0000-0...', 'zz000zzzzzzzzzz...') 

#1 /home/.../public_html/wp-includes/class-wp-hook.php(287): Sac_Digital_Popup_Public->popup('') 

#2 /home/.../public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array) 

#3 /home/.../public_html/wp-includes/plugin.php(484): WP_Hook->do_action(Array) 

#4 /home/..../public_html/wp-includes/general-template.php(3021): do_action('wp_footer')

O site n?o apresenta erros ao desativar o plugin SAC DIGITAL POUP.