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"Unable to open [object Object]:..." error

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I was hoping to try out a few Library of Congress maps for a class this week, but I keep getting this error!

I suspect this is the same error as a bug reported for Courtauld Institute images?

Example 1 -

https://www.loc.gov/item/2012593214/

Manifest:

https://www.loc.gov/item/2012593214/manifest.json

Example 2 -

https://www.loc.gov/item/2021589948/

Manifest:

https://www.loc.gov/item/2021589948/manifest.json

However, this one works:

https://www.loc.gov/item/99446220/

Any thoughts?

Posted by Katie McDonough ·
4 comments

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Comments4

  • Rainer Simon

    Team•

    Feb 3

    Hi @Katie McDonough,

    I was able to load all those maps fine just now. However I know there’s the intermittent issue with the LoC (and some other providers) that they have additional bot prevention measures in place, and that their IIIF servers also get overloaded frequently (and we all know why…)

    In this case, accessing the manifest URL will return their error page (or in some cases a “are you a human” challenge page, I believe) instead of the actual manifest – and that’s what will then cause error you’re seeing above.

    Not much you can do, TBH, except try again later. I’ll put it on the Todo list to check for this type of error specifically, and surface a more meaningful error message.

    • Katie McDonough

      •

      Feb 3

      Ahh, OK, this makes sense. Not ideal for teaching demos - I’ll keep trying, in a non-bot-like manner!

      • Rainer Simon

        Team•

        Feb 3

        I know. Some collections are more affected than others. LoC is one of the worst (or “hardest hit” I guess).

        If you want to be independent of the current bot-weather situation, you could always self-host a handful of samples. (I think LoC provides full-image downloads, too. So you could easily pull some over into your own image server.)

        • Katie McDonough

          •

          Feb 3

          Yes, I was thinking about tiny-iiif more for showing students how to move from a physical map to a digital IIIF resource they can annotate, but this is also a good use case!