I tried to submit a hotel expense report but the Concur didn't allow me to do so because it said it required a pre-approval request.  I went back to try to create a request but it didn't accept the hotel check-in date to be in the past so it didn't allow me to create a request. Now I am stuck. What can I do?

P.S. - I did get an approval from my manager beforehand but it's not through the Concur system. I would suggest Concur to at least allow other form of approval or attachment of the proof.