IOS Certificate issue

Hello, please i need help, after upgrading to ionic v 3.19.1 i can`t call any webservice in ios as the below error, please your urgent help.

Failed to load resource: The certificate for this server is invalid. You might be connecting to a server that is pretending to be “” which could put your confidential information at risk.

XMLHttpRequest cannot load https://…/token due to access control checks.

However i added the below code in AppDelegate.m

@implementation NSURLRequest(DataController)

  • (BOOL)allowsAnyHTTPSCertificateForHost:(NSString *)host
    return YES;