install aegir automatic install.sh

I download the latest version of Aegir system (0.4-alpha13) and Provision (0.4-alpha13)..

I create user "aegir" and add to group "www-data" and home folder is "/var/aegir". I extract file install.sh.txt from provision-0.4-alpha13.tgz to /var/aegir.

I change to user "aegir" and run the install file:

su -s /bin/bash - aegir
sh install.sh

The setup is run OK. But at the end of task, I get the error. Please give me solution to fix this error.

This is the setup: