SocketRocket IOS Swift unable to re open socket it is crashing

Question

I am using following library for Socket connection https://github.com/facebook/SocketRocket

Following is my code to create socket connection

 socketRocket = SRWebSocket(url: URL(string: streamUrl)!)
 socketRocket?.delegate = self
 socketRocket?.open()

Now if there is any network error like wifi turned off Socket is disconnected and does not work if even if internet is turned on again

I tried following code to reopen socket but it is not working

 socketRocket?.close()
 socketRocket?.open()

How to reopen socket or resume socket after network or any other error occurs?