Not a DOI
The resolution service at https://doi.org resolves DOIs. You have attempted to resolve dm5migu4zj3pb.cloudfront.net/manuscripts/107000/107254/scanned_pages/small/899.png, which is not a DOI.
dm5migu4zj3pb.cloudfront.net/manuscripts/107000/107254/scanned_pages/small/899.png may be a Handle (DOIs are a special sort of Handle). If dm5migu4zj3pb.cloudfront.net/manuscripts/107000/107254/scanned_pages/small/899.png is a valid Handle you should be able to resolve it at https://hdl.handle.net.
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