Love using the app to shop, but I can't ever check In. App always returns an error saying they are having technical difficulties and are working on the issue. Been this way for months. I've tried updating the app, uninspiring and reinstallng...nothing works. I have to call to let the store know I've arrived. Had to downgrade a star. Check in STILL does not work. This is a significant part of the pick up process. Why has this gone unchecked for so long?