I had to keep manually entering the TC number after about 5 attempts it finally went through. Everytime I scanned bar code I would receive an error message.
Being told that manually entering the TC# should work, as opposed to scanning the receipt. We're still looking into getting this resolved but that could be a workaround.
I have ibotta linked to my Walmart pay. Usually I see credits within a few minutes. I purchased a few items over 24 hours ago and still have not seen my credits. I would normally give it a bit more time, but since others are experiencing issues, I thought it might be worth mentioning.