Sending value from escrow contract address with transfer function - node.js

Question

I want to call transferMoney() function which should send value (requests[_id].value) to an address address(uint160(requests[_id].provider)) with the transfer function of solidity. When I call this function via my DApp-Frontend using MetaMask, first I get the confirmation but the transaction gots reverted by the EVM. On etherscan, I see the status = fail. My aim is to send value from contract owner to another account.
What could cause the problem?
Here is the transaction hash on etherscan ropsten testnet: 0x30cef6bc33a25aeb4693a7c463ddf5dd597e0bd2c2ceb47feb38f29599feb4aa
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.21 <0.7.0;
contract PrinterMarketplace {
uint256 public requestCount = 0;
uint balance;
address payable escrow = msg.sender;
mapping(uint256 => Request) public requests;
struct Request {
uint256 id;
string fileName;
string fileHash;
address payable client;
address payable provider;
string price;
uint256 value;
string status;
}
function purchaseOffer(
uint256 _id,
address payable _client,
address payable _provider,
string memory _fileHash
) public payable{
requests[_id].status = "purchased";
requests[_id].value = msg.value;
emit OrderEvent(_id, _fileHash, _client, _provider, requests[_id].status);
escrow.transfer(msg.value);
}
function transferMoney(
uint256 _id
) public {
address(uint160(requests[_id].provider)).transfer(requests[_id].value);
requests[_id].status = "paid";
}
}