I tried to check-in for an AMS-JFK flight using the app. I entered everything, then at the last step it said "oops, there's a problem. Try again later". After a few rounds of that, I tried checking in on the website. It also reported an error at the end, but this time it said KLM is handling the flight (it's a DL marketed and operated flight), here's a link to KLM. I went to the KLM website and found it wanted contact information (my email, phone and address), all of which DL has. After supplying that info to KLM, the check-in was successful. I could download the BP and a bit later the BP showed up in the DL app.

In the past I've sometimes had problems checking in on the web, but the app worked. This is a new one for me.

Is this a known glitch?

ELGRACHT 15 AMSTERDAM