I'm getting a weird error while installing PIwik
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.
But I don't have mod_security enabled. (I checked via
sudo a2enmod mod-security)
I can't make sense of it. I installed Piwik easily enough on a cheap shared host, but I'm getting this inexplicable error message on my DO server.