How to solve this Gas estimation failed error on Remix? - blockchain

Question

my code is
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.1;
import "https://github.com/Uniswap/uniswap-v2-periphery/blob/master/contracts/interfaces/IUniswapV2Router02.sol";
contract UniswapExample {
address internal constant UNISWAP_ROUTER_ADDRESS = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ;
IUniswapV2Router02 public uniswapRouter;
address private multiDaiKovan = 0xaD6D458402F60fD3Bd25163575031ACDce07538D;
constructor() {
uniswapRouter = IUniswapV2Router02(UNISWAP_ROUTER_ADDRESS);
}
function convertEthToDai(uint daiAmount) public payable {
uint deadline = block.timestamp + 15; // using 'now' for convenience, for mainnet pass deadline from frontend!
uniswapRouter.swapETHForExactTokens{ value: msg.value }(daiAmount, getPathForETHtoDAI(), address(this), deadline);
// refund leftover ETH to user
(bool success,) = msg.sender.call{ value: address(this).balance }("");
require(success, "refund failed");
}
function getEstimatedETHforDAI(uint daiAmount) public view returns (uint[] memory) {
return uniswapRouter.getAmountsIn(daiAmount, getPathForETHtoDAI());
}
function getPathForETHtoDAI() private view returns (address[] memory) {
address[] memory path = new address[](2);
path[0] = uniswapRouter.WETH();
path[1] = multiDaiKovan;
return path;
}
//add Harry
function getaddresWETH() public view returns (address WETHaddress){
return uniswapRouter.WETH();
}
//add Harry
function getAmountsETHforDAI(uint daiAmount) public view returns (uint[] memory) {
return uniswapRouter.getAmountsOut(daiAmount, getPathForETHtoDAI());
}
}
i input input 100000000000000000 on convertEthToDai function then,
i saw this error enter image description here
how to solve the problem?
and this is remix setting
enter image description here