MetaMask - RPC Error: Internal JSON-RPC error

Hi, I am currently working on a DEX with hardhat and everything works well so far. But if I switch to Moralis Binance Smart Chain I am getting always RPC json error. But the code is the same I tested on hardhat. I am using Speed Node the free version.

For example, I am calling the following function:

 const exchangeAddress = await this.state.factory.getPair(

but getting

  inpage.js:1 MetaMask - RPC Error: Internal JSON-RPC error. 
  {code: -32603, message: 'Internal JSON-RPC error.', data: {…}}
  code: -32603
  data: {code: -32000, message: 'execution reverted'}
  message: "Internal JSON-RPC error."
[[Prototype]]: Object

Expected result is: 0x0000000000000000000000000000000000000000

My browser looks like this:

Connecting to Metamask or chain via:

  connectToWeb3 = async () => {
    try {
      if (window.ethereum) {
        window.web3 = new Web3(window.ethereum);
        //await window.ethereum.enable();

        window.ethereum.on('chainChanged', (chainId: string) =>
      } else if (window.web3) {
        window.web3 = new Web3(window.web3.currentProvider);
      } else {
          'Non-Ethereum browser detected. You should consider trying Metamask'
    } catch (err) {