Fed & State accepted on April 23, but “Where’s My Refund” tool on IRS site continually says “we cannot provide any information”. Should I be concerned?

Fed & State accepted on April 23, but “Where’s My Refund” tool on IRS site continually says “we cannot provide any information”.  Today is the 29th. Should I be concerned? What does this mean? I’m sure I entered my info correctly (many times over).