[Geschlossen] I cannot save the automatic translation

Background of the issue:
I want to change the type of automatic translation on my site versteckter Link from Deepl to PTC using WPML.

Symptoms:
Once I save the change to PTC and reload the page, it shows that Deepl is again the default translation method.

Questions:
Why does the translation method revert to Deepl after saving and reloading?
How can I successfully change the automatic translation method to PTC?