This is usually caused by the hosts file being set to read-only or locked by anti-virus.
[06 AM]
https://answers.avira.com/en/question/avira-blocks-hosts-file-what-can-i-do-90
[Step%201]
Go …
I’ve tried performing the suggested actions found in the link you sent me ↑, but to no avail. When I try to create a site, it still shows the same error messages.