Handle non correct birdseye settings

src/screens/BirdseyeScreen/BirdseyeScreen.tsx

@@ -8,9 +8,22 @@ export const BirdseyeScreen = () => {
     return <BaseText>Loading ...</BaseText>;
   }
 
-  if (config.data?.birdseye.enabled) {
-    return <WebRTCView cameraName="birdseye" />;
+  if (config.isError) {
+    return <BaseText>Failed to load frigate config</BaseText>;
   }
 
-  return <BaseText>Birdseye is not enabled</BaseText>;
+  if (!config.data?.birdseye.enabled) {
+    return <BaseText>Birdseye is not enabled</BaseText>;
+  }
+
+  if (!config.data?.birdseye.restream) {
+    return (
+      <BaseText>
+        Restream must be enabled so that the birdseye feed is served through
+        WebRTC. Please update your Frigate config.
+      </BaseText>
+    );
+  }
+
+  return <WebRTCView cameraName="birdseye" />;
 };