Wordpress WooCommerece Product Issue

I am getting the below error on accessing https://origamiitlab.com/product/prevent-v4/

Fatal error: Uncaught TypeError: Unsupported operand types: string * int in /home1/origa4mw/public_html/wp-content/plugins/woocommerce/includes/wc-formatting-functions.php:579 Stack trace: #0 /home1/origa4mw/public_html/wp-content/plugins/creame-whatsapp-me/public/class-joinchat-woopublic.php(199): wc_price('') #1 /home1/origa4mw/public_html/wp-content/plugins/creame-whatsapp-me/public/class-joinchat-woopublic.php(217): JoinChatWooPublic->format_price(Object(WC_Product_Simple), '') #2 /home1/origa4mw/public_html/wp-content/plugins/creame-whatsapp-me/public/class-joinchat-woopublic.php(159): JoinChatWooPublic->get_regular_price(Object(WC_Product_Simple)) #3 /home1/origa4mw/public_html/wp-includes/class-wp-hook.php(307): JoinChatWooPublic->replacements(Array) #4 /home1/origa4mw/public_html/wp-includes/plugin.php(191): WP_Hook->apply_filters(Array, Array) #5 /home1/origa4mw/public_html/wp-content/plugins/creame-whatsapp-me/includes/class-joinchat-util.php(219): apply_filters('joinchat_variab...', Array) #6 /home1/origa4mw/public_html/wp-content/plugins/creame-whatsapp-me/public/class-joinchat-public.php(159): JoinChatUtil::replace_variables('') #7 /home1/origa4mw/public_html/wp-includes/class-wp-hook.php(307): JoinChatPublic->get_settings(Object(WP)) #8 /home1/origa4mw/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #9 /home1/origa4mw/public_html/wp-includes/plugin.php(524): WP_Hook->do_action(Array) #10 /home1/origa4mw/public_html/wp-includes/class-wp.php(787): do_action_ref_array('wp', Array) #11 /home1/origa4mw/public_html/wp-includes/functions.php(1330): WP->main('') #12 /home1/origa4mw/public_html/wp-blog-header.php(16): wp() #13 /home1/origa4mw/public_html/index.php(17): require('/home1/origa4mw...') #14 {main} thrown in /home1/origa4mw/public_html/wp-content/plugins/woocommerce/includes/wc-formatting-functions.php on line 579

Need a fix for this. Will Pay INR 2000/-