I just updated PIWIK to the latest version. I used the built-in update feature.
During the installation itself, the formatting of the pages was wrong – it seemed to be using the default fonts etc. rather than the proper formatting. And now it is the same in piwik itself, which renders the whole installation unusable. See the attached screenshot.
So I downloaded the latest version and uploaded the files manually, by FTP, to my server, but this made no diffence.
Prior to the installation everything was ok?
Any idea what went wrong and how I can fix it?