Piwik: PHP upgrade broke Piwik

Question

I have upgraded PHP from 5.3.7 to 5.4.4 on my Debian 6 (Squeeze) system. After this upgrade Piwik stopped working. The following error occurs:

The string to escape is not a valid UTF-8 string in "@CoreHome/getDefaultIndexView.twig".

I tried Googling, but could not get any solution. Anyone knows how to fix this error?

Thanks, Anji

Answer 1

If you have issues with the update process, download Piwik manually and replace it with your installed system.

For security reasons, take a backup from your database and your config file.