fix: report with timeout chart (#16674)

diff --git a/superset/utils/webdriver.py b/superset/utils/webdriver.py
index c81f8c2..638f0c0 100644
--- a/superset/utils/webdriver.py
+++ b/superset/utils/webdriver.py
@@ -141,6 +141,7 @@
             img = element.screenshot_as_png
         except TimeoutException:
             logger.warning("Selenium timed out requesting url %s", url, exc_info=True)
+            img = element.screenshot_as_png
         except StaleElementReferenceException:
             logger.error(
                 "Selenium got a stale element while requesting url %s",