• Ahh - so @skm it's possible it was a Linux issue. I wonder whether the OS-provided file chooser fails to run if there's no 'description' for the file format (which ended up being the problem - according to the docs it's supposed to be optional). My Laptop may have worked because it used a different Linux distro.

    It seemed like an odd problem as usually the web browser would give a better, more targeted error when something like that happens


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