After the automatic update of Matomo from 3.4.0 to 3.5.0 could display the CoreHome anymore
Log said following:
AH01071: Got error 'PHP message: PHP Fatal error: Cannot declare class Piwik\Plugins\GeoIp2\GeoIp2, because the name is already in use in /var/www/vhosts/path/to/matomo/plugins/GeoIp2/GeoIp2.php on line 0\n', referer: https://xxxxxxxx.de/index.php?module=CoreHome&action=index&idSite=1&period=day&date=yesterday
Check out #12846
for the solution
Problem was caused by two GeoIp Installations in the Plugin Folder.
There were two folders one called "GeoIp2" and one "GeoIP2". I deleted simply the older one "GeoIP2". Problem was fixed
I had a same problem while updating Piwik(Matomo) 3.4.0 to 3.5.0 the Problem was fixed.
Because i just Renamed the folder "GeoIP2" to "GeoIP2_need_to_delete" in the Plugin Folder.
Thanks for helping.