Crashes Multisite

Hello
Would love to use this plugin but looks like it doesn’t support Multisite. On Network Activation, I get this error:

Fatal error: Uncaught Error: Call to undefined function wp_is_mobile() in /app/wp-content/plugins/checkout-upsell-funnel-for-woo/includes/data.php:239 Stack trace: #0 /app/wp-content/plugins/checkout-upsell-funnel-for-woo/includes/frontend/ob-cart.php(12): VICUFFW_CHECKOUT_UPSELL_FUNNEL_Data->enable(‘ob_’) #1 /app/wp-content/plugins/checkout-upsell-funnel-for-woo/includes/functions.php(33): VICUFFW_CHECKOUT_UPSELL_FUNNEL_Frontend_Ob_Cart->__construct() #2 /app/wp-content/plugins/checkout-upsell-funnel-for-woo/includes/define.php(31): villatheme_include_folder(‘/app/wp-content…’, ‘VICUFFW_CHECKOU…’) #3 /app/wp-content/plugins/checkout-upsell-funnel-for-woo/checkout-upsell-funnel-for-woo.php(40): require_once(‘/app/wp-content…’) #4 /app/wp-settings.php(373): include_once(‘/app/wp-content…’) #5 /app/wp-config.php(115): require_once(‘/app/wp-setting…’) #6 /app/wp-load.php(50): require_once(‘/app/wp-config….’) #7 /app/wp-admin/admin.php(34): require_once(‘/app/wp-load.ph…’) #8 /app/wp-admin/network/admin.php(13): in /app/wp-content/plugins/checkout-upsell-funnel-for-woo/includes/data.php on line 239

This is with all other plugins deactivated. WordPress 6.0.2