Ownable: caller is not the owner with ERC1155 contract from the Contract Wizard

Hi I created a 1155 contract via the Wizard. It keeps getting "Ownable: caller is not the owner" error on remix when I'm trying to run the mint function. No modification to the code yet; just using the boilerplate code from the Wizard.

Below is the code. Thanks.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;

import "@openzeppelin/contracts-upgradeable/token/ERC1155/ERC1155Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC1155/extensions/ERC1155BurnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC1155/extensions/ERC1155SupplyUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";

contract MyToken is Initializable, ERC1155Upgradeable, OwnableUpgradeable, PausableUpgradeable, ERC1155BurnableUpgradeable, ERC1155SupplyUpgradeable, UUPSUpgradeable {
    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() initializer {}

    function initialize() initializer public {
        __ERC1155_init("");
        __Ownable_init();
        __Pausable_init();
        __ERC1155Burnable_init();
        __ERC1155Supply_init();
        __UUPSUpgradeable_init();
    }

    function setURI(string memory newuri) public onlyOwner {
        _setURI(newuri);
    }

    function pause() public onlyOwner {
        _pause();
    }

    function unpause() public onlyOwner {
        _unpause();
    }

    function mint(address account, uint256 id, uint256 amount, bytes memory data)
        public
        onlyOwner
    {
        _mint(account, id, amount, data);
    }

    function mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data)
        public
        onlyOwner
    {
        _mintBatch(to, ids, amounts, data);
    }

    function _beforeTokenTransfer(address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data)
        internal
        whenNotPaused
        override(ERC1155Upgradeable, ERC1155SupplyUpgradeable)
    {
        super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
    }

    function _authorizeUpgrade(address newImplementation)
        internal
        onlyOwner
        override
    {}
}