Hello everyone! I have a problem with require in my

Question

Hello everyone! I have a problem with require in my

contract.
I have a such midifier:
modifier onlyOwner {
require(msg.sender == OWNER, "Access denied");
_;
}

Also I have a constructor when I initialize OWNER var:
constructor() {
OWNER = msg.sender;
}

And when I'm making a request via web3.js to the method with this modifier from owner I'm getting 'Access denied' error:
const tx = contract.methods.Method("args");
const receipt = await tx
.send({
from: signer.address,
gas: await tx.estimateGas(),
});

Above I print OWNER address and signer.address and I have the same values:
const owner = await contract.methods.OWNER().call();
console.log(owner);
console.log(signer.address);

Output of these:
0x9d17a8517afa39b8c06b9A041A6361E06c43029D
0x9d17a8517afa39b8c06b9A041A6361E06c43029D

Can anybody help me? What's wrong? I tested in the rinkeby testnet