On iOS PDF File getting opened but immediatley closes.

[DhruvKalpeshThakar]

export const downloadSalarySlip = (request) => async (dispatch) => {
try {
const userinfo = await AsyncStorage.getItem('LoginData');
const token = JSON.parse(userinfo)?.token;

const response = await makeAPIRequest({
  method: GET,
  url: `${api.downloadSalarySlipApi}?user_id=228`,
  headers: {
    'Content-Type': 'application/pdf',
    Authorization: `Bearer ${token}`,
  },
  responseType: 'arraybuffer',
});

if (response?.data) {
  const filePath = `${RNFS.DocumentDirectoryPath}/SalarySlip_${Date.now()}.pdf`;
  console.log('File path:', filePath);

  const buffer = Buffer.from(response.data);
  await RNFS.writeFile(filePath, buffer.toString('base64'), 'base64');
  console.log('File saved successfully at:', filePath);

  // Introduce a delay of 300ms before opening the file
  setTimeout(() => {
    FileViewer.open(filePath, { type: 'application/pdf' })
      .then(() => {
        console.log('PDF opened successfully!');
        if (request.onSuccess) request.onSuccess(filePath);
      })
      .catch((error) => {
        console.error('Error opening PDF:', error);
        if (request.onFail) request.onFail('Error opening PDF');
      });
  }, 300); // 300ms delay
} else {
  console.error('No data in API response');
  if (request.onFail) request.onFail('No data in API response');
}

} catch (error) {
console.error('Error downloading salary slip:', error);
if (request.onFail) request.onFail(error.message);
}
};

I have tried adding delay of 300ms to manage but its still not working