WARN Piwik\Session[2021-06-12 13:47:35] [9e1f1] Unable to start session: session has already been started by session.auto-start or session_start()
Error: Unable to start session. Please check that the web server has enough permission to write to these files/directories:
For example, on a Linux server if your Apache httpd user is www-data, you can try to execute:
chown -R www-data:www-data /home/var/www/html/com/net-profil/subdomains/stats/tmp/sessions/
chmod -R 0755 /home/var/www/html/com/net-profil/subdomains/stats/tmp/sessions/
If you still experience issues after trying these changes, we recommend that you enable database session storage.
Debug: the original error was session has already been started by session.auto-start or session_start()