BuddyPress.org

@wgbcworship Did you check if your registration works if BuddyPress is deactivated? What’s in your .htaccess file?

@wgbcworship where did you install WP/BP? Localhost or server? Windows or Linux? Either way, is WP installed at domain root e.g. example.com or in physical subdomain or in physical subdirectory of example.com? Are all letters in subdomain or subdirectory folder in lowercase?

@wgbcworship
Have you tried batch deactivating plugins except for BP and testing registration against each plugin after you re-activate them individually?