Hi Herre,
even although I’m not a member of the wpml support team, I found this older support post that may help you – just found it after facing the very same js wpml related error:
https://wpml.org/forums/topic/javascript-error-in-post-edit-js/
Just add the lines given via pastebin to end of wpml plugin’s sitepress.php to include jquery-ui script again and the error should disappear – and should hopefully be fixed with another better tested wpml release.
Best regards
Stefan
