BuddyPress.org

Hi,
I have a quite fresh buddypress installation. Today I wanted to register some users for testing purposes. But it doesn’t work. It reloads the page without any message after pressing register-button.
I found out that it has to do with a checkbox for privacy (I have read and agree to this site’s Privacy Policy…). Even agreed no registering possible.
When I switch to the legacy template the checkbox is gone and the registering works as expected but not with the Noveau template.
On line 2580 of bp-nouveau\includes\template-tags.php the policy accepatance is set:

<div class="privacy-policy-accept">
		<?php if ( $error ) : ?>
			<?php nouveau_error_template( $error ); ?>
		<?php endif; ?>

		<label for="signup-privacy-policy-accept">
			<input type="hidden" name="signup-privacy-policy-check" value="1" />

			<?php /* translators: link to Privacy Policy */ ?>
			<input type="checkbox" name="signup-privacy-policy-accept" id="signup-privacy-policy-accept" required /> <?php printf( esc_html__( 'I have read and agree to this site\'s %s.', 'buddypress' ), sprintf( '<a href="%s">%s</a>', esc_url( get_privacy_policy_url() ), esc_html__( 'Privacy Policy', 'buddypress' ) ) ); ?>
		</label>
	</div>

How can I fix this?

Only buddypress plugin is installed, theme twenty tweny four.