File integrity error after update to 3.0.2

Hi!

I´m running a Debian GNU/Linux 8-Server with Piwik 3.0.2.

I´m using following repos:

deb https://debian.piwik.org/ piwik main
deb-src https://debian.piwik.org/ piwik main

After the update to 3.0.2 (from 3.0.1) the systemcheck shows me following message:

Die nachfolgenden Fehler könnten durch einen teilweise oder gänzlich fehlgeschlagenen Upload der Piwik-Dateien entstanden sein.
–> Versuche die Piwik-Dateien im BINARY-Modus neu hochzuladen. <–

Fehlende Datei: /usr/share/piwik//etc/apt/trusted.gpg.d/piwik-keyring-automatic.gpg

In english it should read like:

The following errors could have been caused by a partial or completely unsuccessful upload of the Piwik files.
-> Try to re-upload the Piwik files in BINARY mode. <-

Missing file: /usr/share/piwik//etc/apt/trusted.gpg.d/piwik-keyring-automatic.gpg

The file “/etc/apt/trusted.gpg.d/piwik-keyring-automatic.gpg” exists on my server…
The file “/usr/share/piwik//etc/apt/trusted.gpg.d/piwik-keyring-automatic.gpg” doesn´t exists.

Everything else in the sytemcheck is green…

Any idea what i can do to get rid of this message?

Greetings
Matthias

When running

php /usr/share/piwik/console diagnostics:run

i get that output:

INFO [2017-03-15 09:16:58] Unable to test if mod_pagespeed is enabled: the request to http://unknown/usr/share/piwik/console?module=Installation&action=getEmptyPageForSystemCheck failed
File integrity: WARNING File integrity check failed and reported some errors. You should fix this issue and then refresh this page until it shows no error.

Directories were found in your Piwik but we didn’t expect them.
–> Please delete these directories to prevent errors.
Memory limit: WARNING M
On a high traffic website, the archiving process may require more memory than currently allowed. If necessary, change the memory_limit directive in your php.ini file.
After making this change, restart your web server.
2 warnings detected

But again no information which files were found…

Any idea?