I have some customization in a Discourse-hosted Discourse. When I hit export, I get a
Failed - No File error in Chrome, with the file-name shown there as the customization’s ID.
If I then open the Chrome downloads page, and click on the failed link, it will download the file correctly. Here below the lower is the earlier file, shows failure, then I’ve clicked on clicked on that entry, and then the upper download happened with the correct filename and all.
I’m using Chromium 56.0.2924.87 on Linux 64-bit