Here's a reply from one of devs on an older post,similar to your situation;
The 867 error code refers to communicating with Amazon web services, which can be caused either by your own network having some connection issue or the Amazon web service in your region going down temporarily.
it could be that,or could be another issue,such as the device your using. Try using a VPN if you're able to,or you could share your device specs to see if the issue is actually your device.