[Решено] WPML Learnpress, courses not shown / not assigned to any language

Background of the issue:
I installed the WPML Learnpress Plugin so i can use WPML with Learnpress.
After installing, i noticed that no courses are shown anymore. Not on the frontend on the user on скрытая ссылка
but also not on the backend. i think the problem is that the courses are not assigned to any language, so now it looks like they don't exist anymore and the users can't see them. i also can't edit them anymore.

freshly created new courses are shown and are assigned to a language.

Symptoms:
no courses shown

Questions:
i ned to show the courses