No websites after update

Hi,

after update to 2.14.3 no websites are showing in administration and dashboard.

Oops … there was a problem during the request. Maybe the server has had a temporary problem or perhaps have requested a report with too much data. Please try again. If this error occurs repeatedly, contact your Piwik administrator for assistance.

Hi there,

please check: I get 'Oops... there was a problem during the request.' or 'Internal Server Error' or '500 error' or the 'White screen of death'. How do I proceed? - Analytics Platform - Matomo