Asset doesn`t work

I can not use new asset that I don`t download before.

When I try to use new asset(both material,model) .It doesn`t start download.

I put that screenshot below.

Someone know how to fix this problem?

Hi there,

please check out your network connection. And disable anti-virus or proxy software for D5 Render. Then restart D5 Render and try again.

Thank you