GitHub user dosubot[bot] added a comment to the discussion: Superset charts are integrated with PlayWright. All charts and data on the page render completely without any unexpected errors before screenshotting. However, there are instances where the data is 0 and the chart is empty. What could be the problem? I am using C# and Superset version 4.0.1.
<!-- Answer --> The most common cause for charts showing zero data or being empty in Playwright automation—but not in direct login—is a difference in authentication/session context. Superset's Playwright integration doesn't perform a UI login; instead, it programmatically sets session cookies for the user in the browser context. If these cookies are missing, expired, or set with the wrong domain/path/samesite attributes, the session may lack the right permissions, causing charts to appear empty even though the page renders without errors. This can also happen if Playwright is using a different user or role than your manual login, or if row-level security or CSRF protection blocks data access in automation sessions [source](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/utils/machine_auth.py#L43-L160). To resolve this, confirm that your Playwright automation is using the same user credentials and session context as your direct login. Check your Superset config for MACHINE_AUTH_PROVIDER_CLASS, WEBDRIVER_BASEURL, and session cookie settings (SESSION_COOKIE_SAMESITE, SESSION_COOKIE_HTTPONLY, SESSION_COOKIE_SECURE) to ensure they match your real login environment. Also, compare network requests and API responses between Playwright and direct login to spot differences in returned data or permissions. If you use caching for screenshots, try disabling it or forcing a refresh to rule out stale images [source](https://github.com/apache/superset/issues/25237#issuecomment-3355672287). If you still see empty charts, check Superset backend logs for authentication or permission errors, and consider testing with a different user or the Public/Guest role to rule out SSO/session issues. For robust automation, always wait for all chart containers and loading spinners to disappear, then add a short delay for chart animations before taking screenshots [source](https://github.com/apache/superset/discussions/36845). <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](https://go.dosu.dev/dosubot).* --- <sup>How did I do? 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