Xbox Dev Mode Error 0x8015963D

Hello Microsoft Partner Support, I am writing this with extreme frustration. I paid my Developer Account registration fees a long time ago to use Xbox Dev Mode, submitted my identity verification, and completed all required setup. However, for a whole year, I have been completely locked out of using my console's developer features due to a severe system bug from your end. The Core Problem: The issue happens directly on my console inside the Xbox Dev Mode (Green) app. Every time I launch the app, it completely fails to generate the 6-digit activation code and instantly throws this error screen: Error code: 0x8015963D (We can't authorize your console). I am completely unable to open or switch to Dev Mode. Due to your recent Partner Center dashboard updates, the option to manually register a console via Serial Number and Console ID has been completely removed for individual developer accounts (leaving only the corporate IP range option), which means I have absolutely no way to bypass this app error or add my device on my own. Troubleshooting Already Completed (Local fixes ruled out): To rule out any local issues, I have already performed the following troubleshooting steps, none of which worked: 1. Hard reset the console and performed a full power cycle. 2. Cleared the Alternate MAC Address and reset the network configurations. 3. Attempted direct activation via the console's hidden Developer Settings menu (LB+RB+LT+RT), which also bypassed the app but still threw the exact same 0x8015963D error screen. 4. Verified that my internet connection is fully online and unrestricted. This completely proves that the activation failure is strictly happening during the secure handshake with Microsoft's Partner Center backend servers, where my console's hardware ID is being rejected. My paid developer account is glitched and failing to authorize my device. This is completely unacceptable. I paid for a service that I haven't been able to use for months while everyone else is enjoying their devices. I demand an immediate resolution to this. Please escalate this ticket to the Xbox Engineering or Partner Center Validation Team so they can manually link my console details to my developer account on your backend database. Please reply to this message so I can securely provide my console's serial number and ID to the agent. Thank you.