I’ve been having this issue for months now. Accompanied by a pop-up with an “oops something went wrong/sorry for the interruption” and such for every action.

No manner of updating the app/ios changes anything. Delete-reinstall, clearing cache, nothing. Latest is desktop on ipad won’t log me in. Can still get into desktop on iphone.

But basically stopped even looking for Hilton options since it’s such a hassle. Except now I have a specific need and would really like to get this fixed. Not finding much online about this either. Hilton claims my account has no issues so they are not particularly helpful either.