Background of the issue:
I am trying to migrate with WPML and WP All Import. When importing categories or posts, there is no button to choose the language in WP All Import. I have updated all three plugins (WP All Import, WPML main plugin, WPML WP All Import). I have deactivated all plugins. Also didn't work. Link to a page where the issue can be seen: hidden link
Symptoms:
There is no button to choose the language of the imported content.
Questions:
Why is the button to choose the language of the imported content missing?
Is there a compatibility issue between WPML and WP All Import?