Same error for me.
After investigating, I found that serve_stored_passthrough_stream() rejects any object whose size exceeds constants::MAX_MEDIA_PROXY_BYTES before attempting to stream it:
if head.content_length > constants::MAX_MEDIA_PROXY_BYTESasu64{returnstorage_error_response(key,StorageError::StreamTooLong);}
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Comment by @cirogargatagli
serve_stored_passthrough_stream()rejects any object whose size exceedsconstants::MAX_MEDIA_PROXY_BYTESbefore attempting to stream it: