incompatible mit WPML?

Since I have installed WPML (WordPress multilingual) Advanced Copuns isnt working. When i try to create a new coupon an error occurs. I get following request below.

I have deactivated the Plugin WPML and the coupon plugin is working again. Does this mean advanced Coupons is not working at all – if i have installed wpml – ?

Error Details
=============
An error of type E_ERROR was caused in line 421 of the file /www/htdocs/w01b474e/music-unite.com/wp-content/plugins/advanced-coupons-for-woocommerce-free/Models/Third_Party_Integrations/WPML_Support.php. Error message: Uncaught Error: Call to a member function is_original_category() on null in /www/htdocs/w01b474e/music-unite.com/wp-content/plugins/advanced-coupons-for-woocommerce-free/Models/Third_Party_Integrations/WPML_Support.php:421
Stack trace:
#0 [internal function]: ACFWFModelsThird_Party_IntegrationsWPML_Support->ACFWFModelsThird_Party_Integrations{closure}('[Slug: wooden-c...', 71)
#1 /www/htdocs/w01b474e/music-unite.com/wp-content/plugins/advanced-coupons-for-woocommerce-free/Models/Third_Party_Integrations/WPML_Support.php(423): array_filter(Array, Object(Closure), 1)
#2 /www/htdocs/w01b474e/music-unite.com/wp-includes/class-wp-hook.php(292): ACFWFModelsThird_Party_IntegrationsWPML_Support->remove_translated_versions_of_categories(Array)
#3 /www/htdocs/w01b474e/music-unite.com/wp-includes/plugin.php(212): WP_Hook->apply_filters(Array, Array)
#4 /www/htdocs/w01b474e/music-unite.com/wp-content/plugins/advanced-coupons-for-woocommerce-free/Models/Cart_Conditions.php(154): apply_filters('acfwf_cart_cond...'

I have deactivated the Plugin WPML and the coupon plugin is working again. Does this mean advanced Coupons is not working – if i have installed wpml – at all?