A new Approval Request is sending an email but approve/reject buttons don't actually approve or reject. When you click on either of them, it redirects the user to the Flow page with the message, "You don’t have any pending requests at this time."
It was working yesterday morning and then stopped working. I thought maybe it was due to some of the changes I had made in other sections of the flow (unrelated to that first step). So today I tried a new flow, "Start approval when a new item is added" and it produces the same behavior when you click on approve or reject button.
The 2nd issue I came accross, if you turn off a flow, it still runs in addition to the new flow I turned on. So I recieve an approval email for both flows and both of them send me to the flow page with e same message listed above.