Can't see to purchase EMB XXX-E2 aircraft

[Robster_9]

I just tried to place an order for 21 EMB175-E2, 28 EMB190-E2 and 21 EMB195-E2.  When I went to place the order, I got an error message stating that the production line would be closing soon and to make my order smaller.  Is this a bug or am I doing something wrong?  Any help is appreciated.

Thanks in advance.