DNS zone file not found

Support Installation
1

Hello.
I get the following warning message when I install yunohost:
DNS zone file not found for domain XXXXXXXXXXX.onlinehome-server.info
After the installation I can’t call up XXXXXXXXXXX.onlinehome-server.info/yunohost
Can somebody help me?

2

Here can you see my problem:
http://www0.xup.in/exec/ximg.php?fid=12224067

The www-folder is also empty:
http://www0.xup.in/exec/ximg.php?fid=64850856

Please help me. Thanks!