IP kommt von window und nicht von.env.local, weil in CHIPTOOL kann die IP eingestellt werden

app/kabelueberwachung/page.jsx

@@ -4,7 +4,9 @@ import Kue705FO from "../../components/modules/Kue705FO";
 
 function Kabelueberwachung() {
   //const apiUrl = process.env.NEXT_PUBLIC_API_BASE_URL;
-  const apiUrl = `https://${window.ip}:443`;
+  const [isClient, setIsClient] = useState(false);
+  const [apiUrl, setApiUrl] = useState("");
+
   const [activeRack, setActiveRack] = useState(1); // Track the active rack
   const [kueIso, setKueIso] = useState([]); // State to store isolation values
   const [kueName, setKueName] = useState([]); // State to store the KUE names
@@ -16,7 +18,15 @@ function Kabelueberwachung() {
   const changeRack = (rack) => {
     setActiveRack(rack);
   };
-
+  useEffect(() => {
+    setIsClient(true);
+    if (typeof window !== "undefined") {
+      setApiUrl(`https://${window.ip}:443`);
+    }
+  }, []);
+  /*   if (!isClient) {
+    return null; // or a loading spinner 
+  }*/
   // Load the external JavaScript file and fetch the isolation values
   useEffect(() => {
     if (window.kueIso && Array.isArray(window.kueIso)) {