How to fix Remote Config: fetch() operation cannot be completed successfully in Firebase

const remoteConfig = firebase.remoteConfig();
remoteConfig.settings.minimumFetchIntervalMillis = 3600000; // 1 hour for development

async function fetchWithRetry(retries = 3, delay = 1000) {
  for (let i = 0; i < retries; i++) {
    try {
      await remoteConfig.fetch();
      await remoteConfig.activate();
      return true;
    } catch (error) {
      console.error(`Fetch attempt ${i + 1} failed:`, error);
      if (i < retries - 1) {
        await new Promise(resolve => setTimeout(resolve, delay * Math.pow(2, i)));
      }
    }
  }
  return false;
}

const success = await fetchWithRetry();
if (!success) console.log('Using cached or default values');

const remoteConfig = firebase.remoteConfig();
remoteConfig.settings.minimumFetchIntervalMillis = 3600000;
remoteConfig.defaultConfig = {
  feature_enabled: true,
  api_timeout: 30000,
  theme: 'dark',
};

// Fetch and activate, but use defaults if it fails
try {
  await remoteConfig.fetchAndActivate();
} catch (error) {
  console.warn('Remote Config fetch failed, using defaults', error);
}

const featureEnabled = remoteConfig.getBoolean('feature_enabled');

const remoteConfig = firebase.remoteConfig();

// Only use this if experiencing repeated fetch failures
await remoteConfig.reset();
await remoteConfig.fetch();
const success = await remoteConfig.activate();
console.log('Config updated:', success);

const remoteConfig = firebase.remoteConfig();

// For development only - use lower intervals
if (process.env.NODE_ENV === 'development') {
  remoteConfig.settings.minimumFetchIntervalMillis = 300000; // 5 minutes
} else {
  remoteConfig.settings.minimumFetchIntervalMillis = 43200000; // 12 hours
}

// Check cache age before fetching
const lastFetch = remoteConfig.settings.lastFetchStatus;
if (lastFetch === 'success') {
  console.log('Using cached config, respecting fetch interval');
} else {
  await remoteConfig.fetch();
}

const firebaseConfig = {
  apiKey: "YOUR_API_KEY",
  projectId: "YOUR_PROJECT_ID",
  databaseURL: "YOUR_DATABASE_URL",
  // ... other fields
};
firebase.initializeApp(firebaseConfig);

const remoteConfig = firebase.remoteConfig();
remoteConfig.settings.minimumFetchIntervalMillis = 3600000;

try {
  const activated = await remoteConfig.fetchAndActivate();
  if (activated) {
    console.log('Remote Config updated and activated');
  } else {
    console.log('Using previously cached config');
  }
} catch (error) {
  console.error('fetchAndActivate failed:', error);
  // App will use defaults or last cached values
}

const remoteConfig = firebase.remoteConfig();

async function checkAndFetch() {
  try {
    const result = await remoteConfig.fetchAndActivate();
    return result;
  } catch (error) {
    if (error.message.includes('Installations')) {
      console.warn('Installations service unavailable, retrying in 30s...');
      await new Promise(r => setTimeout(r, 30000));
      return checkAndFetch(); // Retry
    }
    throw error;
  }
}