Firefox’s built-in VPN worked until yesterday, but now it loops between “Continue to VPN” and “Get started.”

Firefox’s built-in VPN worked until yesterday, but now it loops between “Continue to VPN” and “Get started.” I use Firefox 159.0.1 (64-bit) on Windows 11 Pro (64-bit). I have already checked the following: Signing out of my Mozilla account and signing back in several times did not help. No “VPN - MVP Beta Holdback” study is listed. “Allow Firefox to improve features, performance, and stability between updates” is enabled. The Policies page says “The Enterprise Policies service is inactive.” The preference browser.ipProtection.entitlementCache exists, but its value is empty. I have not changed or deleted it. Please help me determine whether this is an account-eligibility problem, a service problem, or a Firefox issue. Please provide simple, step-by-step instructions.