It is definitely a confusing message since it prompts you to upgrade. However, GCP is currently undergoing an incident. Railway is seeing GCP build degradation on their side. They've status'd to indicate. You can always see their status for incidents here: https://status.railway.com/

Hey there 👋

GCP is currently undergoing an incident. We're seeing GCP build degradation on our side. We've status'd to indicate. You can always see our status for incidents here: https://status.railway.com/

We're also seeing incidents light up across the internet at other providers who similarly have a dependency on GCP for certain services. Please send some hugs for your fellow on-call engineers today.