Error after update: Undefined index: force_ssl

I see this on my screen - and nothing else :slight_smile:

in ‘/path/to/piwik/core/FrontController.php’ at the line 263

#0 Piwik_ErrorHandler(…) called at [/path/to/piwik/core/FrontController.php:263]
#1 Piwik_FrontController->init(…) called at [/path/to/piwik/index.php:52]

please try to reupload all files?

I had the same problem. The solution was to reupload config/global.ini.php from:
http://dev.piwik.org/svn/trunk/config/global.ini.php

Maybe your database needs an update afterwards and you should then be directed to the login screen.

That seems to be a similar problem as for the users that end up with a blank screen after the update.

Solution from: 301 Moved Permanently