Re: Dashboard problem
BuddyPress works in single site mode. The only time you want multisite or network is if you want to allow your members to create blogs.
If that’s the case, deactivate BuddyPress. Then follow steps to create a network here – https://codex.wordpress.org/Create_A_Network. Then double-check your WordPress is working as it should before installing BuddyPress – https://codex.buddypress.org/getting-started/before-installing/