[Gelöst] Translation Engines/Management not loading

Hello,

We have a problem on this site:
versteckter Link

because WPML stopped working, that is now we are not anymore able to edit the translations, because when we click on the tranlsation ico, both on the edit page of the original language and the icon in the pages list, the system always display the original language page, and not the translated page. So we cannot access th translated pages from the backend anymore.

We tried to disable all the plugin except from WPML,a nd also tried to change the theme, using a legacy, one, but the problem persists. So we think i something related to the WPML itself. Noe we enable again all the plugin and the theme.