0x Limit Orders - Fill order reverted when specifying taker in order

Question

I've been trying to fill an order with a signer and a fixed taker. When not defining the taker, fillLimitOrder() gets executed without problem. But when specifying my taker in my order, I instantly get execution reverted. Here's my code:

    const order = new LimitOrder({
        makerToken: contractWrappers.contractAddresses.etherToken,
        takerToken: contractWrappers.contractAddresses.zrxToken,
        makerAmount: "1",
        takerAmount: "100000000000000000000", 
        maker: account,
        taker: RECEIVER, // When defining taker here, the transaction gets reverted
        sender: NULL_ADDRESS,
        expiry: getFutureExpiryInSeconds(),
        salt: Date.now().toString(),
        chainId: CHAIN_ID,
        verifyingContract: contractWrappers.contractAddresses.exchangeProxy
    });

 const supportedProvider = new MetamaskSubprovider(
        ethereum
    );

    const signature = await order.getSignatureWithProviderAsync(
        supportedProvider,
        SignatureType.EIP712
    );

    const txHash = await contractWrappers.exchangeProxy // Filling the order here
        .fillLimitOrder(order, signature, takerAssetFillAmount)
        .awaitTransactionSuccessAsync({from: account})
        .catch((err) => console.error(err));

Thanks for your input!