After installing Front area of D8 not working

Team,

i just installed this module and my front area for web page got below red color error.

LogicException: A stray drupal_render() invocation with $is_root_call = TRUE is causing bubbling of attached assets to break. in Drupal\Core\Render\Renderer->doRender() (line 485 of core/lib/Drupal/Core/Render/Renderer.php).

But same module i installed one month back and it was working fine.

if any one help me how to contribute in this module then i am interested to fix this issue.... please advice.