There is a problem with installing Piwik when
mbstring.func_overload in php.ini is not
Piwik just throws exception like
Can't install Piwik: An exception has been thrown during the rendering of a template ("parse error: failed at content: ; line: 3682"winking smiley in "@Installation/layout.twig" at line 40.. And it's not so easy to understand what is wrong.
It's kind of popular issue:
https://github.com/piwik/piwik/issues/5338 http://forum.piwik.org/read.php?2,117181,117181 https://discussion.heroku.com/t/piwik-installation-problems-push-fails-configuration-not-correct/1073
:+1: for the record the installation doesn't even work if that setting is on