Thank you for reaching out.
It looks like you are using an outdated notebook -- apologies that this is still in the documentation. We are continuously developing and improving our notebooks, and ask that users update their notebooks frequently. To get the latest set, please open in the Jupyter dashboard a new terminal window (top right, button "New", then "Terminal".) In the terminal, please type
where <dirname> is the name of your target directory, e.g. AUG16.
Then go back to the dashboard, click on the new directory (e.g. AUG16), where you will find the latest notebooks. In 03_ScienceExamples/DwarfGalaxies/ you will find the current DesDr1 notebook. With this notebook I tried your ra&dec coordinates, and have gotten images in several bands.
I hope this helps. Please let us know if you experience further trouble.
And we will make sure to update our User Manual very soon.