Problem:
In this case, the site has buttons that link to the internal content of the site. On the translated content this button links to content that is not yet published.
Internal links are not translatable inside the WPML Translation Editor, as WPML auto-adjusts those links once a translation for the content that you are linking to has been published.
Solution:
Usually, it is not recommended to manually edit the translated content inside the WordPress Editor or a Page Builder if you are translating the content with the WPML Translation Editor, as the WPML Translation Editor would overwrite those changes once you translate the content.
Anyhow, in this case, the only solution would be to manually edit the button URL in the second language until the translated content that you are linking to on the original content is translated and published.
