**Steps to replicate the issue** (include links if applicable):
* Go to https://commons.wikimedia.org/wiki/File:Parts_of_Hoshangabad,_Betul_and_Chhindwara,_Indian_Atlas,_sheets_71,_72,_53,_54_(15214002).jpg
* Click on ZoomViewer
**What happens?**:
```No webservice
The URL you have requested, https://zoomviewer.toolforge.org/index.php?f=Himalaya,_Indian_Atlas,_sheet_66_(15219000).jpg&flash=no, is not currently serviced.```
**What should have happened instead?**:
Image not displayed.
**Other information** (browser name/version, screenshots, etc.):
Chrome on Windows 10.
Also on other large files (no thumbnail is produced for these files):
* https://commons.wikimedia.org/wiki/File:Himalaya,_Indian_Atlas,_sheet_66_(15219000).jpg
* https://commons.wikimedia.org/wiki/File:Kashmir,_Indian_Atlas,_sheet_28_(15198000).jpg
* https://commons.wikimedia.org/wiki/File:District_Darrang,_Assam_(10620000).jpg
This is particularly an issue, as for these large files, we give a warning: "The original file is very high-resolution. It might not load properly or could cause your browser to freeze when opened at full size. To avoid these issues, use the ZoomViewer."
This also happens on files where there is a thumbnail:
https://commons.wikimedia.org/wiki/File:Map_of_the_Northern_Part_of_the_Punjab_and_of_Kashmir_(13305002).jpg