Unfortunately, I don't think you can say it works when a simple HTML import fails with no error message and the UI just hangs up. I'm not doubting that it works for you, but I think the bar for "works" is higher when you're trying to build a product. Emailed you the file that fails for me and hopefully you'll be able to find a solution.

Thank you for sending your bookmarks, haven't received it yet, is it a large file ?

No, it's only ~500KB.

It was a nasty nginx permissions error, thank you so much letting me know so I solved it.

It does look like it's working now, although I see the speed shows as "B/MS". Shouldn't this be "BM/S"? The speed also seems to be useless as it says 336 B/MS but I only have ~1000 bookmarks and I've been sitting on the page for several minutes.