Env variables not working in Server components

[spare fractal]

In my nextjs app, the environment variables work only in client components, but not in server components and server actions. Note that the variables work when I run the build task locally, but not when I host on vercel.

const url = ${process.env.NEXT_PUBLIC_BACK_URL}/conversations; when called in server components doesnot read the env variable. How to solve this?
I define the env variables in the vercel dashboard

[hollow lava]

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[copper axle]

well, env variables are avalaible node js development mode but if you deploy your project on vercel then you have to also give all env varibales when deploying -- past and copy then vercel willl make them avalaible when ever some components try to access them.

got it?