Error: This environment's XHR implementation cannot support binary transfer

This work is on react native. I have created a secret client (secret blockchain client). But when I am trying to perform transaction, getting the following error: Error: This environment's XHR implementation cannot support binary transfer.

here is my code snippet:

const tx = await clientt.tx.bank.send(
{
  amount: [{amount: '3000000', denom: 'uscrt'}],
  fromAddress: wallet.address,
  toAddress: recipient, // Set recipient to sender for testing
},
{
  gasLimit: 20_000,
  gasPriceInFeeDenom: 0.25,
  memo: 'send tokens example',
},

);