BuddyPress.org

Take a look here https://codex.wordpress.org/Using_Permalinks where the difference between the types of permalink are explained. You have the /index.php/ in your permalink settings.This is probably because your hosting provider needs them for your normal WordPress to work, I notice you have reverted to the default which wont work for Buddypress anyway.

Ask your hosting provider for a rewrite.script file so that you can have ‘pretty permalinks’