Socket error: PKCS12 file not specified.

[SodaSurfer]

Hi there

I'm trying to connect and create an ssl socket using the following code snippet:
let fileCertURL = Bundle.main.url(forResource:"cert", withExtension: "pem")?.path
let fileKeyURL = Bundle.main.url(forResource:"key", withExtension: "pem")?.path
let myConfig = SSLService.Configuration(withCACertificateFilePath: nil, usingCertificateFile: fileCertURL, withKeyFile: fileKeyURL, usingSelfSignedCerts: true, cipherSuite: nil)
var socket = try Socket.create()
socket.delegate = try SSLService(usingConfiguration: myConfig)
try socket.connect(to: "******", port: ****)

But I keep getting this error:
ERROR: Socket error: PKCS12 file not specified.

I am running this code on my actual iPhone device (not macOS) and by the documentation it doesn't says that I need to add a .pkcs12 file anywhere

any help is appreciated

[Nahatakyan]

Try to create certificate with this instruction and use that certificate
https://www.ibm.com/docs/en/api-connect/10.0.1.x?topic=overview-generating-self-signed-certificate-using-openssl