def METHOD_NAME(dash_duo, precalculated_rf_regression_explainer):
    db = ExplainerDashboard(precalculated_rf_regression_explainer, title="testing", responsive=False, simple=True)
    html = db.to_html()
    assert html.startswith('\n<!DOCTYPE html>\n<html'), "failed to generate dashboard to_html"
    dash_duo.start_server(db.app)
    dash_duo.wait_for_text_to_equal("h1", "testing", timeout=20)
    assert dash_duo.get_logs() == [], "browser console should contain no error"