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Hey I've written a socket client and have the following problem, when I send a message to my socket server for the first time, it comes on and everything works, but if I send another message (the second message) (for example, the same one ) comes the error [Fatal error: Unexpectedly found nil while implicitly unwrapping an optional value]. I hope someone can help me with this problem.😕func sendData(data: AnyObject) { let sendData = "\(data)\r\n" guard let sendDataUFT = sendData.data(using: .utf8) else { return } let sendDataCount = sendDataUFT.count let bytesWritten: Int = sendDataUFT.withUnsafeBytes() { (buffer: UnsafePointer<UInt8>) in return outputStream.write(buffer, maxLength: sendDataCount) (<-- The mistake comes in this line) } if bytesWritten < sendDataCount { } }