Why is this contract call failing (rust-counter increment)? - nearprotocol

Question

I am attempting to call the increment in the counter contract here, which is deployed to my account on testnet, using the following script:
const nearAPI = require("near-api-js");
require("dotenv").config();
const {parseSeedPhrase} = require("near-seed-phrase");
async function call() {
const mneumonic = process.env.nearmneumonic0?.trim() || "";
const ACCOUNT_ID = process.env.nearacct0?.trim() || "";
const keyStores = nearAPI.keyStores;
const keyPair = nearAPI.KeyPair;
const connect = nearAPI.connect;
const keyStore = new keyStores.InMemoryKeyStore();
const PRIVATE_KEY = parseSeedPhrase(mneumonic);
const keyPair_ = keyPair.fromString(PRIVATE_KEY.secretKey);
await keyStore.setKey("testnet", ACCOUNT_ID, keyPair_);
const config = {
keyStore,
networkId: "testnet",
nodeUrl: "https://rpc.testnet.near.org",
};
const near = await connect(config);
const account = await near.account(ACCOUNT_ID);
const contract = new nearAPI.Contract(
account,
ACCOUNT_ID,
{
changeMethods: ["increment", "decrement", "reset"],
viewMethods: ["get_num"],
sender: account,
}
);
let response = await contract.increment(
{
args: {
//arg_name: "value"
},
gas: 300000000000000
}
);
console.log(response);
}
call();
However, the response thrown is al followed:
Failure [acct.testnet]: Error: Contract method is not found
...
ServerTransactionError: Contract method is not found
I have looked through some of the docs, which mention to add changeMethod/viewMethod, however it seems there is still errors thrown.
Any help much appreciated!