Firefox's built-in VPN stopped working without an external VPN connection, despite previously working with my regular Iranian internet connection.

Hi tHello Mozilla Support Team, I am a user from Iran, and I have been using Firefox's built-in VPN (the 50 GB monthly VPN included with a Mozilla account). Previously, I was able to use the built-in VPN directly with my Iranian internet connection, without needing any external VPN or proxy. However, after connecting to an external VPN configuration while using Firefox, the built-in VPN stopped working independently. Now, whenever I disconnect my external VPN and try to enable Firefox's built-in VPN, I receive the following error message: "VPN is unavailable due to local laws and restrictions." Interestingly, the built-in VPN works again whenever my external VPN is connected. I have already tried restarting Firefox, testing a different internet connection (mobile hotspot), and checking my browser's connection settings. Unfortunately, none of these steps resolved the issue. I would like to emphasize that I was previously able to use this feature from Iran without an external VPN connection. Could you please investigate why my access has changed and let me know whether there is a way to restore the previous functionality? I would really appreciate your help, as I rely on this service and would like to continue using it. Thank you for your time and support. Best regards