How do I fix this problem and how do I login again?
The Piwik Super User can manually edit the file piwik/config/config.ini.php and add the following lines:
[General] trusted_hosts = "piwik.jambas.cz"After making the change, you will be able to login again.
You may also disable this security feature (not recommended). To do so edit config/config.ini.php and add:
You are requesting data for the Custom Segment '', this Piwik configuration currently prevents real time processing of reports for performance reasons.
Your segmented analytics reports will be available later. We apologize for the inconvenience.