You must create a page with a site root flag. This name will be used to create the configuration directory. Mind the recommendations for directory names (only a-z,0-9,_,-) and make it unique. Main URL to call the frontend in default language. Can be https://www.example.com/ or just /, if it is just a / you cannot rely on TYPO3 creating full URLs The title of the website is used for the title tag in the frontend This allows you to specify variants of the site's base. Can be used, for example, if you have a different domain for your staging environment. Use a full qualified domain "https://www.mydomain.fr/" or "/fr/". Use "/" to keep the main URL for the default language. Add language specific suffixes to use those, or configure complete URLs for independent domains. Used for localized date and currency formats. E.g. "de_DE" or "en_US.UTF-8". Optional, used for "hreflang" attributes - if empty, the information is retrieved from the locale With this language based Website title, you can override the Website title for this language Used within language-related menus Make sure to have at least 0 (not defined otherwise) configured in order to serve helpful error messages to your visitors. Path to the fluid template file given by absolute, relative path (from site root) or by referring the template file inside an extension with "EXT:" prefix. Fully qualified class name to a class that implements the PageErrorHandlerInterface. For example "https://staging.domain.tld" or "http://www.domain.local" Expression to match this base variant.