An unexpected error has occurred

Steam is having technical issues due to the following reasons:

• Some kind of a temporary processing issue caused by a hiccup on the Steam client’s or the server’s end.

• An IP proxy or VPN being in effect. The Steam store is programmed to decline any actions initiated while the client’s IP address is masked or spoofed.

• Steam servers being down.

How can you solve it?

• Retry redeeming your code.

• Disable any VPNs you have turned on.

• Wait for the underlying issue to be resolved.

• Contact Steam Support.