AshishKapoor opened a new issue #10022:
URL: https://github.com/apache/incubator-superset/issues/10022
A clear and concise description of what the bug is.
### Expected results
Should return the image data.
### Actual results
I'm getting `{ "message": "OK Async" }` when calling for the thumbnail.
#### Screenshots
<img width="734" alt="Screenshot 2020-06-09 at 4 46 55 PM"
src="https://user-images.githubusercontent.com/5203107/84142666-d123cf00-aa72-11ea-964e-a4d4a7ed05da.png";>
#### How to reproduce the bug
1. Go to 'Dashboard'
2. Apply `<hostname>:<port>/api/v1/dashboard/<thumbnail_url>`
3. See error
### Environment
(please complete the following information):
- superset version: `Superset 0.999.0dev`
- python version: `Python 3.7.7`
- node.js version: `v12.16.3`
- npm version: `6.14.4`
- operating system: Fedora 31 (Workstation Edition) x86_64
### Checklist
Make sure these boxes are checked before submitting your issue - thank you!
- [x] I have checked the superset logs for python stacktraces and included
it here as text if there are any.
- [x] I have reproduced the issue with at least the latest released version
of superset.
- [x] I have checked the issue tracker for the same issue and I haven't
found one similar.
### Additional context
Add any other context about the problem here.
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![https://user-images.githubusercontent.com/5203107/84142666-d123cf00-aa72-11ea-964e-a4d4a7ed05da.png"](https://user-images.githubusercontent.com/5203107/84142666-d123cf00-aa72-11ea-964e-a4d4a7ed05da.png"){kind=link}
