I have installed Piwik in the past and have found the process to go very smoothly. However, with the current version of Piwik I get the error
500 GET request to piwik.php failed. Try whitelisting this URL from HTTP Authentication and disable mod_security (you may have to ask your webhost). For more information about the error, check your web server error log file. After making this change, restart your web server.
I thought this might be an issue with my new LEMP stack so I tried again on a classic LAMP server but got exactly the same result. I should add that I am not using HTTP authentication, have no firewall and am not using mod_security so nothing suggested in the error message above offers any help.
My log files indicate that it tries to find config.ini.php could not be found. Inspecting the /var/www/html/piwik/config/ reveals that there is in fact no such file.
I would be most grateful to anyone who might be able to tell me how to fix the problem.