code: public void forward() {
  
          m_context.getSetupBean().prepareStep10();
          CmsSetupBean bean = m_context.getSetupBean();
          VaadinServletRequest request = (VaadinServletRequest)(VaadinRequest.getCurrent());
          String servletMapping = bean.getServletMapping();
          String openLink = null;
  
          if (!servletMapping.startsWith("/")) {
              servletMapping = "/" + servletMapping;
          }
          if (servletMapping.endsWith("/*")) {
              // usually a mapping must be in the form "/opencms/*", cut off all slashes
              servletMapping = servletMapping.substring(0, servletMapping.length() - 2);
          }
          openLink = request.getContextPath() + servletMapping + (bean.hasIndexHtml() ? "/index.html" : "/system/login");
  
          A_CmsUI.get().getPage().setLocation(openLink);
      }
docs: Proceed to next step.