Hi I can't use anymore wolfram alpha app on ipad2 due to "Hmmmm.... Invalid Signature" error message.
Tried to reinstall, inizialize iPad, but nothing works.
IOS 7 and compatible wolfram alpha app from iTunes Store.
I have the same problem in an IPad Pro and iPad air2. This is frustrating. I deleted and reinstalled the app. First there was a ok or report message and now is only an ok message
Experienced the same issue here.
Yes, very same issue regardless the "weight"of the query.
At least it's not a problem of my iPad2... wish I knew that, I've lost all my history reinstalling wolfram :-(
Working again now, looks like Garret Nievin was right about being "networky"...
Anyway thnx, even if I thought someone from Wolfram Staff would have written something.
I have version 184.108.40.2066121601 on my iPad Air and it works just fine. Latest iOS.
The problem may have to do with any update you may have done. or not done. or -- as hypothesized -- a network issue.