line 16 of /etc/apache2/sites-enabled/karadav.conf: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuratio Action '-t' failed. The Apache error log may have more information. $ sudo a2enmod rewrite Enabling module rewrite. To activate the new configuration, you need to run: systemctl restart apache2 $ sudo systemctl restart apache2 20