My deadline was the same as you, but I gave up waiting and applied with an explanation on July 12. On July 24 I got a message from them asking me to upload some other documents that apparently were not legible, but they didn't say anything about the FBI PCC yet... I don't know if it's ok, because on their website they say something like "if, on the last day, you still haven't received the pcc, you can upload an explanation and apply. But it's not guaranteed that your application will be accepted with an explanation"... So I guess it's your call =)