yousoph opened a new issue, #30736:
URL: https://github.com/apache/superset/issues/30736
### Bug description
When a dashboard is empty OR has only text elements, when the user tries to
send an API call to generate a screenshot, they get an error message instead of
a screenshot
### Repro steps:
1. Create a dashboard with just a title and save it OR create a dashboard
with some text elements only and save it
2. Find the dashboard ID of the dashboard
3. Use the API to try to generate a screenshot for the dashboard
Use POST endpoint
`/api/v1/dashboard/{{DashboardID}}/cache_dashboard_screenshot/`
By default, an empty array can be used as the request body to get the
dashboard screenshot. Alternatively, it's possible to include below fields in
the body:
- dataMask (array): Specifies the dataMask configuration (controls
applied filters).
- activeTabs (list): Specify the tab(s) that should be included/selected.
- urlParams (list): List of URL params to be applied to the dashboard.
The request returns an image_url value, that can be used to download the
dashboard. It's also possible to append ?download_format=pdf to download a PDF
as opposed to an image.
### Expected results
A blank or text-only dashboard image/PDF will be generated.
### Actual results
{"message":"Not found"} error was shown.
### Screenshots/recordings
_No response_
### Superset version
master / latest-dev
### Python version
3.9
### Node version
16
### Browser
Chrome
### Additional context
_No response_
### Checklist
- [X] I have searched Superset docs and Slack and didn't find a solution to
my problem.
- [X] I have searched the GitHub issue tracker and didn't find a similar bug
report.
- [ ] I have checked Superset's logs for errors and if I found a relevant
Python stacktrace, I included it here as text in the "additional context"
section.
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