Please help me with this showing uncaught in promise

[Karan]

ERC20_ABI2 = [{“inputs”:[{“internalType”:“contract RewardKaran”,“name”:"_testToken",“type”:“address”}],“payable”:true,“stateMutability”:“payable”,“type”:“constructor”},{“constant”:false,“inputs”:[{“internalType”:“uint256”,“name”:"_value",“type”:“uint256”}],“name”:“changeAPY”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”},{“constant”:false,“inputs”:[],“name”:“claimTst”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”},{“constant”:true,“inputs”:[],“name”:“customAPY”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“name”:“customHasStaked”,“outputs”:[{“internalType”:“bool”,“name”:"",“type”:“bool”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“name”:“customIsStakingAtm”,“outputs”:[{“internalType”:“bool”,“name”:"",“type”:“bool”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:false,“inputs”:[],“name”:“customRewards”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“name”:“customStakers”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:false,“inputs”:[{“internalType”:“uint256”,“name”:"_amount",“type”:“uint256”}],“name”:“customStaking”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“name”:“customStakingBalance”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[],“name”:“customTotalStaked”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:false,“inputs”:[],“name”:“customUnstake”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”},{“constant”:true,“inputs”:[],“name”:“defaultAPY”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“name”:“hasStaked”,“outputs”:[{“internalType”:“bool”,“name”:"",“type”:“bool”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“name”:“isStakingAtm”,“outputs”:[{“internalType”:“bool”,“name”:"",“type”:“bool”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[],“name”:“name”,“outputs”:[{“internalType”:“string”,“name”:"",“type”:“string”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[],“name”:“owner”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:false,“inputs”:[],“name”:“redistributeRewards”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”},{“constant”:false,“inputs”:[{“internalType”:“uint256”,“name”:"_amount",“type”:“uint256”}],“name”:“stakeTokens”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“name”:“stakers”,“outputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[{“internalType”:“address”,“name”:"",“type”:“address”}],“name”:“stakingBalance”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[],“name”:“testToken”,“outputs”:[{“internalType”:“contract RewardKaran”,“name”:"",“type”:“address”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:true,“inputs”:[],“name”:“totalStaked”,“outputs”:[{“internalType”:“uint256”,“name”:"",“type”:“uint256”}],“payable”:false,“stateMutability”:“view”,“type”:“function”},{“constant”:false,“inputs”:[],“name”:“unstakeTokens”,“outputs”:[],“payable”:false,“stateMutability”:“nonpayable”,“type”:“function”}];
async function tsuply(){
y = await Moralis.Web3API.native.runContractFunction({
chain: “mumbai”,
address: “0xf8aDc852F8CaE4395d03AaBF5534051Bf4AEFAD1”,
function_name: “customStakingBalance”,
abi: ERC20_ABI2,
params: { who : “0x4830EDD0C016c556b48C0847E3b0b6b767F20de1”},

})
console.log(y);
}
tsuply();

[qudusayo]

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Here’s a fix

const ERC20_ABI2 = [
  {
    constant: true,
    inputs: [{ internalType: "address", name: "who", type: "address" }],
    name: "customStakingBalance",
    outputs: [{ internalType: "uint256", name: "", type: "uint256" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
];
async function tsuply() {
  let res = await Moralis.Web3API.native.runContractFunction({
    chain: "mumbai",
    address: "0xf8aDc852F8CaE4395d03AaBF5534051Bf4AEFAD1",
    function_name: "customStakingBalance",
    abi: ERC20_ABI2,
    params: { who: "0x4830EDD0C016c556b48C0847E3b0b6b767F20de1" },
  });
  console.log(res);
}
tsuply();