This worked great for the permalinks — thank you! This is the most straightforward explanation I’ve found after 3 days of trying to make this work!
I’m still getting a blank page for my 404s though.
I asked my web host to point to wp-404-handler.php for the 404. Is there anything else that has to be set up? I’ve got 404.php in my themes folder.
Thanks for any help you can offer.