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SSSP 2 and 3 requires Content-Type and Content-Length
Old SSSP 2 and 3 has limitation on the file system API and might not be able to download files using FileSystem API and Media Cache API.
Why it's happening
SSSP 2 and 3 require file headers -
Content-Length - to be available on your server.
How to Resolve
- Check that your server, CDN and storage (e.g. AWS S3) are sharing these headers.
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