Reason: The file is 1-layer board, while you choose "2-layer" in the ordering process at PCBWay.com(or file is 2 layers boards, but you choose 1 layer on PCBWay). We need the online specifications to be in accord with the gerber file to proceed.
Suggestion:
A:Please note correct for copper layer, solder mask layer and the silkscreen you need for single layer board. For example: top copper layer, top solder mask layer, top silkscreen layer.
B: If you have plated holes design, the boards need to be made as 2 layers board.
We can add some pads on the copper layer to make it as 2 layers board.