Ok, since you installed it using apt, I'm sure it also installed apache2. You do:
apt-get remove --purge apache2* nginx* uwsgi*
Then follow the guide to reinstall nginx and uwsgi. I updated that section today to avoid the conflicts with apache and nginx.
Otherwise, it seems as though your setup is correctly setup because you're able to log into baruwa.
If you log in as your guest your, I'm assuming this is your domain admin, do you see any mails being populated?
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