Today, we are issuing the 3.15.2 patch release.
Fixes
In order to use the Prisma Data Proxy via Prisma Client, you need to generate it with prisma generate --data-proxy as described in our documentation. We are introducing PRISMA_GENERATE_DATAPROXY="true" as an additional way to do the same thing, but via an environment variable.
This is necessary, for example, to reliably deploy a Prisma Client for Data Proxy on Vercel Serverless Functions, where it can be hard to update the build command to run prisma generate --data-proxy. Starting with this version you can just set PRISMA_GENERATE_DATAPROXY="true" as an environment variable the Vercel project settings.
If you are unfamiliar with the Data Proxy, read how to get started.