Cannot access - error_log

Hi,
I cannot access piwik, error 500.
The file error reports since days:
[25-Jul-2015 01:01:45 UTC] PHP Fatal error: Call to undefined method Piwik\Site::setSiteFromArray() in /home/XYZ/public_html/piwik/plugins/SitesManager/API.php on line 195

(i replaced my cPanel account with XYZ)

How can I solve it?

Thanks

Hi there,

Feel free to try again installing with the latest 2.15.0 beta version which includes many fixes and improvements, see: I would like to test early beta and RC releases, how do I enable automatic updates to use these development versions? - Analytics Platform - Matomo

If you still have a problem, please create an issue on our tracker GitHub - matomo-org/piwik: Liberating Web Analytics. Star us on Github? +1. Matomo is the leading open alternative to Google Analytics that gives you full control over your data. Matomo lets you easily collect data from websites, apps & the IoT and visualise this data and extract insights. Privacy is built-in. We love Pull Requests!