invalid response sendTransaction - bsc pancakeswap approve

[YabberWalkie]

I've been trying to figure out now for hours why my cod isn't work and i just can't figure it out :(

All i'm receiving is an error message:
(node:31956) UnhandledPromiseRejectionWarning: Error: invalid response - sendTransaction
at WebSocketProvider.BaseProvider._wrapTransaction (E:\python\PancakeMix\node_modules@ethersproject\providers\lib\base-provider.js:1264:19)
at WebSocketProvider. (E:\python\PancakeMix\node_modules@ethersproject\providers\lib\base-provider.js:1336:52)
at step (E:\python\PancakeMix\node_modules@ethersproject\providers\lib\base-provider.js:48:23)
at Object.next (E:\python\PancakeMix\node_modules@ethersproject\providers\lib\base-provider.js:29:53)
at fulfilled (E:\python\PancakeMix\node_modules@ethersproject\providers\lib\base-provider.js:20:58)
at processTicksAndRejections (internal/process/task_queues.js:95:5)

My code:

`
const ethers = require('ethers');
var config = require('./config.json')

const addresses = {
WBNB: '0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c',
factory: '0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73',
router: '0x10ED43C718714eb63d5aA57B78B54704E256024E',
recipient: '0x6013fE5de132862c4Ec0CCc2E0A023d2Ac845C0F'.toLocaleLowerCase()
}

//First address of this mnemonic must have enough BNB to pay for tx fess
const provider = new ethers.providers.WebSocketProvider(config.network);
const wallet = ethers.Wallet.fromMnemonic(config.mnemonic);
const account = wallet.connect(provider);

const router = new ethers.Contract(
addresses.router,
[
'function getAmountsOut(uint amountIn, address[] memory path) public view returns (uint[] memory amounts)',
'function swapExactTokensForTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts)'
],
account
);

const wbnb = new ethers.Contract(
addresses.WBNB,
[
'function approve(address spender, uint amount) public returns(bool)',
],
account
);

const init = async () => {

let overrides = {
gasPrice: 5000000000,
gasLimit: 500000
};

const tx = await wbnb.approve(
router.address,
ethers.utils.parseUnits('0.002', 'ether'),
overrides
);
const receipt = await tx.wait();
console.log('Transaction receipt');
console.log(receipt);
}

init();
`

My code that calls the function getAmountsOut does seem to work, however calling approve, or swapExactTokensForTokens from the other contract always fail with this error message.

I'm using the wss://apis.ankr.com/wss/ endpoint..