Error after upgrade: Constructor Piwik\\Factory::factory() cannot be static (1 reply)

Hi

After doing an automatic upgrade I received the following error on completion (whenever trying to access the site now as well):

PHP Fatal error: Constructor Piwik\\Factory::factory() cannot be static in /var/www/pistats/core/Factory.php

I've also tried downloading and manually copying across the files but I get the same error.

Any thoughts/suggestions?

thanks