Signing FA at beginning of new game?

All right, first time DDSPF player and now for my first stupid question. I've started new game go to the FA screen during the FA period. Go to bid on FAs, sort players, find FB (none on roster and one is required) I want to bid on but.. I see no way to submit a bid. What am I missing?
No offer button on the screen. I went into player card>contract. There it suggests an amount but I see no way to actually make an offer.
My roster is overfilled, approx. 70 players but it's preseason and cuts will be coming. Is this why I can't submit a bid?

My roster is overfilled, approx. 70 players but it's preseason and cuts will be coming. Is this why I can't submit a bid?