Can't Update Diablo IV: Vessel of Hatred Deluxe to Ultimate on PC Using Real Money

In some cases, the use of VPN or trying to make the purchase through phone devices can lead to this error. Please try the following troubleshooting steps: 

1. Make sure you are not using a VPN when making the purchase
2. Make the purchase from your PC
3. Clear your browser cache
4. Make sure the payment method is correctly set

If the problem persists, please file a bug report in our official Diablo IV forums. Submissions posted there have the benefit of allowing community discussion around high-impact bugs, which can help with analysis and prioritization..