[Fryvisuals]

You can either change WP_DEBUG to false inside wp-config.php

OR if you need debugging for development go to /plugins/bbpress/includes/core/sub-actions.php

function bbp_setup_current_user() {
	if ( ! did_action( 'after_setup_theme' ) ) {
		// comment out line below
		// _doing_it_wrong( __FUNCTION__, __( 'The current user is being initialized without using $wp->init().', 'bbpress' ), '2.3' );
	}

	do_action( 'bbp_setup_current_user' );
}