Please read the documentation about this situation: {T269452}
And the file with the problem is: https://commons.wikimedia.org/wiki/File:DSC_8200-Pano.tif
>>! In T269452#6670699, @AntiCompositeNumber wrote:
> The problem is that `tiffinfo` considers the file invalid, so MediaWiki thinks the files are 0x0 px. It doesn't bother to generate thumbnail links, and serves a "broken thumbnail" image instead. Manually creating a thumbnail link like https://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/DSC_8200-Pano.tif/220px-DSC_8200-Pano.tif.jpg shows that the Thumbor thumbnail generation is working fine. In any case, thumbnails will be generated within 60s from the first request or not at all.
>
> Running `tiffinfo DSC_8200-Pano.tif` results in
> ```
> TIFFReadDirectory: Warning, Unknown field with tag 37724 (0x935c) encountered.
> TIFFFetchNormalTag: Warning, Incompatible type for "RichTIFFIPTC"; tag ignored.
> ```
> `tiffinfo` then proceeds to spew hex from the file instead of any useful output.
>
> You may be able to make the file work by exporting it with different settings. Otherwise, please report the problem to the `tiffinfo` developers #upstream