Try another path.

lib/request.js

@@ -3,8 +3,6 @@ import requestIp from 'request-ip';
 import { browserName, detectOS } from 'detect-browser';
 import isLocalhost from 'is-localhost-ip';
 import maxmind from 'maxmind';
-import getConfig from 'next/config';
-const { serverRuntimeConfig } = getConfig();
 
 import {
   DESKTOP_OS,
@@ -63,9 +61,7 @@ export async function getCountry(req, ip) {
   }
 
   // Database lookup
-  const lookup = await maxmind.open(
-    path.resolve(serverRuntimeConfig.PROJECT_ROOT, 'public/geo/GeoLite2-Country.mmdb'),
-  );
+  const lookup = await maxmind.open(path.resolve('./public/geo/GeoLite2-Country.mmdb'));
 
   const result = lookup.get(ip);