🔧 Fixed the process env var

src/client/constants/endpoints.ts

@@ -38,7 +38,7 @@ export const IMPORT_SERVICE_BASE_URI = hostURIBuilder({
 
 export const SOCKET_BASE_URI = hostURIBuilder({
   protocol: "http",
-  host: process.env.LIBRARY_SOCKET_HOST || "localhost",
+  host: process.env.UNDERLYING_HOSTNAME || "localhost",
   port: "3001",
   apiPath: `/`,
 });