[Gelöst] I cannot access to my language page setup in subdomain foramt de.exemple.com

Background of the issue:
I am trying to set up a language page using a subdomain format, specifically de.exemple.com, for my site versteckter Link.

Symptoms:
I cannot access my language page set up in the subdomain format de.exemple.com.

Questions:
Can you help me set up my language page in the subdomain format?