Topic: Admin - URL Scheme notice
The following is in the admin
URL Scheme (SEF URLs) for your board's pages
WARNING! If you select any scheme other than the default scheme you must copy/upload the file .htaccess from the extras directory into the forum root directory. The server that hosts the forums must be configured with mod_rewrite support and must allow the use of .htaccess files. For servers other than Apache, please refer to your servers documentation.
However there is no .htaccess in the extras folder, You rename the .htaccess.dist to just .htaccess
You might want to update that notice there