Need help with purchased product on FANZA/DMM

[Onryo]

Hello, I want to ask a question about a purchased JAV product on FANZA/DMM. after I purchased it, I clicked the product. i saw a "Download" button. when i clicked it, it showed this error. What do i do? How i can download the video properly?

 

[Casshern2]

Are you in Japan or using a VPN as from Japan?