Where is the webpage?

I still have a valid licence but I’m getting errors visible on the query monitor and my wp-admin is heavely slowed down.

1. 
   wp-content/plugins/custom-product-tabs-pro/classes/EDD_SL_Plugin_Updater.php:47
2. WPForms\ErrorHandler->error_handler()
   wp-content/plugins/custom-product-tabs-pro/classes/EDD_SL_Plugin_Updater.php:47
3. EDD_SL_Plugin_Updater_CPT_Pro->__construct()
   wp-content/plugins/custom-product-tabs-pro/classes/licensing.php:268
4. YIKES_Custom_Product_Tabs_Pro_Licensing->update_available_question_mark()
   wp-includes/class-wp-hook.php:324
5. do_action('admin_init')
   wp-admin/admin.php:175

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