As the title sounds my APP doesn't call the internal API, when im hosting it inside my computer it works fine when im using Vercel it doesnt

const ROOT_URL = process.env.VERCEL_URL ? `https://${process.env.VERCEL_URL}` : process.env.ROOT_URL

          const response = await fetch(`${ROOT_URL}/api/update`, {
            method: 'POST',
            headers: {
              'Authorization': `Bearer ${process.env.UPDATE_API_TOKEN}`,
              'Content-Type': 'application/json',
            },
            body: JSON.stringify({
              id: idOrName2,
              newDescription: newDescription,
              userid: user,
            }),
          });