Step by step Im fallow to guide: https://multilingualpress.org/docs/how-to-install-wordpress-multisite/
Main website working. Only issue with this new both.
Also I add DNS A record to DirectAdmin and CloudFlare etc.
after run our new site with subdomain example de.mymynewsite.com I get issue: Apache is functioning normally
propagation had to take place. So can anyone give a hint?