Steps to replicate the issue (include links if applicable):

• Visit https://commons.wikimedia.org/wiki/File:CERN_ATLAS_Detector.jpg
• Click on 360° panoramic viewer
• Land on https://panoviewer.toolforge.org/#CERN_ATLAS_Detector.jpg

What happens?:

HTTP 502 Bad Gateway

What should have happened instead?:

Something.