Apache2 serving default page /var/www/html even though it's disabled

Hi there,

yesterday I upgraded to Debian 8 and installed iMSCP 1.2.11.
Now i've got the issue, that Apache2 is serving the content of /var/www/html on my default server-address via port 80 (thor.medienlampe.de).
I already tried to find the responsible config file via grep -rnw '/etc/' -e 'www/html', grep -rnw '/var/' -e 'www/html' and even grep -rnw '/' -e 'www/html' with no helpful results.

Furthermore, there is no symlink to any default inside sites-enabled for /etc/apache2 or /etc/nginx - I also removed 000-default/default from both sites-available folders.

Thanks in advance for your support!

Thanks for your answers!

Quote from mrpink

After the upgrade to Debian Jessie did you run the imscp installer again?

If not, please do that: perl imscp-autoinstall -d

Yes, I did that to install my migrated data. The Debian 8 has been installed on a fresh KVM and the old data has been migrated.

Quote from Ninos

Also you could try to purge apache2 and rerun the installer..

I'll give that a try and tell if it worked.

Well, it didn't work at all.
Now, the default Apache2 page is back online.

EDIT:
To clarify: it's just the base-url which isn't working - the other vHosts are running just fine.

Now that's really, really strange.
I already cleared all browser caches and tried it in different browsers.

What's even more strange is, that it's still showing me the default page on my phone (where I never visited the page).
Well, I now deactivated my WiFi and tried it via the mobile network and it works.

I never encountered something like that before - thank you both very much for your support!

Thank you.

Next week, I'll have a look at it. Would be nice if it would be possible to realize with IP dual stack.