10 hours ago, musicmaster said:The only places where CodeMappings are mentioned are /localization/CLDR/core/common/supplemental/supplementalData.xml and /src/Core/Localization/CLDR/Reader.php
There it looks like it has something to do with countries.
So I suggest that you try to choose another country during the installation. You can always change it later on.
Thanks . I change many countries but no solution there.