Issues with connecting to Testnet via API

[SurpriseMF3000]

Hello,
im facing Issues with with connecting to Testnet via Alamofire.

Error:

ERROR : API IN: POST https://btc-testnet.horizontalsystems.xyz/api/tx/address
noResponse(reason: Optional("Session was invalidated without error, so it was likely deinitialized unexpectedly. Be sure to retain a reference to your Session for the duration of your requests."))

Code:

    func checkbalance(){
        
        print("CheckBalance start");
        
        let bitcoinKit: BitcoinKit
    
        let words = [Safety wise]
    
        bitcoinKit = try! BitcoinKit(withWords: words, bip: .bip44, walletId: "bitcoin-wallet-id", syncMode: .api, networkType: .testNet, logger: .none)

    
        bitcoinKit.start()
        
        
        print(bitcoinKit.receiveAddress())
        
        print(bitcoinKit.balance)
        
        print(bitcoinKit.statusInfo)
        
        try? bitcoinKit.send(to: "mrjQyzbX9SiJxRC2mQhT4LvxFEmt9KEeRY", value: 1000, feeRate: 10000, sortType: .none)
        
        
        print("BTC session completed!")
        
        
        bitcoinKit.stop()
    
    }

Thanks for Help!

[ealymbaev]

You should retain an instance of BitcoinKit in order to survive the sync process. In your case - your BitcoinKit instance is being stopped and destroyed immediately.

[SurpriseMF3000]

How?
If im deleting bitcoinKit.stop(), im getting the same error.