This problem was found on NED's ivv.ned.ipac.caltech.edu/byname, using NGC 4151.  Click on images the click on the first row 'View Image'.   The image gets fetched by the browser (Chrome and Firefox), but the display gets greyed out, and all subsequent attempts to 'View Images' appear to result in fetches, but the screen remains greyed out.

It also is easily reproduced using an IRSA viewer on a firefly server using v1.0.0 Built On: 2018-10-31, Git commit 79022a. Try http://ff1.ned.ipac.caltech.edu:8080/firefly/ and upload the attached fits file.

Note: Uploading the attached image to the irsaviewer application hosted on https://irsa.ipac.caltech.edu (v3.1.0_Final-3099) works as advertised.

Implementation fixed 2 issues:

• ThumbnailViewer does a undefined check it should have been doing, this protects the render()
• A plate projection sets up the coordinate system correctly