dosubot[bot] commented on issue #31146:
URL: https://github.com/apache/superset/issues/31146#issuecomment-2498161386

   <!-- Answer -->
   I found a similar closed issue regarding bar charts not rendering properly 
in dashboard emails, but no solution was found in the comments. You can view 
the issue [here](https://github.com/apache/superset/issues/14351) 
<sup>[[1]](https://github.com/apache/superset/issues/14351)</sup>.
   
   For troubleshooting issues with chart rendering in Superset email reports, 
you can follow these steps:
   
   1. **Confirm Feature Flag and Permissions**: Ensure the `ALERT_REPORTS` 
feature flag is enabled in your configuration file. Verify that your 
configuration file is being loaded correctly by enabling another feature flag 
and checking its effect. Log in as an admin user to ensure you have adequate 
permissions.
   
   2. **Check Celery Worker Logs**: Examine the logs of your Celery worker for 
any errors or issues. In a Docker Compose deployment, use a command like 
`docker logs superset_worker --since 1h` to view recent logs.
   
   3. **Verify Web Browser and WebDriver Installation**: Ensure that the 
headless browser (Firefox or Chrome) and the corresponding WebDriver are 
correctly installed and configured. If you can send a chart as CSV or text but 
not as PNG, the issue might be with the browser setup. Test the installation by 
running `firefox --headless` and `geckodriver` in the Superset worker 
environment.
   
   4. **Send a Test Email**: Test your email configuration by sending a test 
email. Use the following Python script to verify the SMTP settings:
      ```python
      import smtplib
      from email.mime.multipart import MIMEMultipart
      from email.mime.text import MIMEText
   
      from_email = '[email protected]'
      to_email = '[email protected]'
      msg = MIMEMultipart()
      msg['From'] = from_email
      msg['To'] = to_email
      msg['Subject'] = 'Superset SMTP config test'
      message = 'It worked'
      msg.attach(MIMEText(message))
      mailserver = smtplib.SMTP('smtpmail.example.com', 25)
      mailserver.sendmail(from_email, to_email, msg.as_string())
      mailserver.quit()
      ```
      Ensure that the SMTP server is accessible and not blocked by any network 
restrictions.
   
   5. **Check Worker Access to Reports**: Verify that the worker can access the 
report URL specified by `WEBDRIVER_BASEURL`. Ensure the URL is correct and that 
the worker can authenticate if necessary 
<sup>[[2]](https://github.com/apache/superset/blob/master/docs/docs/configuration/alerts-reports.mdx)</sup>.
   
   
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