provable/ethereum-api

@oraclize-support I am trying the code from provable documentation
// SPDX-License-Identifier: GPL-3.0
pragma solidity > 0.6.1 < 0.7.0;
import "github.com/provable-things/ethereum-api/provableAPI_0.6.sol";

contract ExampleContract is usingProvable {

string public ETHUSD;
bytes32 public queryId;
event LogConstructorInitiated(string nextStep);
event LogPriceUpdated(string data,string price);
event LogNewProvableQuery(string description);
event LogCallbackCalled(string data);

constructor() public payable {
provable_setCustomGasPrice(10000000000);
emit LogConstructorInitiated("Constructor was initiated. Call 'updatePrice()' to send the Provable Query.");
}

function __callback(bytes32 myid, string memory result) public override {
emit LogCallbackCalled("Callback called");
if (msg.sender != provable_cbAddress()) revert();
ETHUSD = result;
emit LogPriceUpdated("Update done",result);

}

function updatePrice() public payable {
if (provable_getPrice("URL") > address(this).balance) {
emit LogNewProvableQuery("Provable query was NOT sent, please add some ETH to cover for the query fee");
} else {
emit LogNewProvableQuery("Provable query was sent, standing by for the answer..");
queryId = provable_query("URL", "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price");
}
}
}

The __callback function is not called on the rinkbey network and the queryId I am getting is showing does not exist on query status search.