Unable to load p12 certificate

[rashmi2487]

I am unable to load the p12 certificate after adding new certificate , it is returning nil on at this line : identity = CertificateIdentity(p12URL: identityURL!, passphrase: "")

Code snippet

if secureMode! {
let caCertificateURL = Bundle.main.url(forResource: "certificate", withExtension: "der")
caCertificate = Certificate(derURL: caCertificateURL!)

        let identityURL = Bundle.main.url(forResource: "certificate", withExtension: "p12")
        identity = CertificateIdentity(p12URL: identityURL!, passphrase: "")
        
        server = Server(identity: identity, caCertificates: [caCertificate])
    } else {
        server = Server()
    }. What  could be possible root cause for this?