Module 'Alamofire' has no member named 'request'

[a-prezioso]

I have some error on class Observer.
Indeed this row throw an error --> Alamofire.request("http://api.icndb.com/jokes/random/\(count)") -- Error: Module 'Alamofire' has no member named 'request'.
I red some post on stackoverflow that say to change 'Alamofire.request' to 'AF.request' from 5.x.x version.
But in this way I have another error on --> 'if let json = response.result.value' -- Error: Type of expression is ambiguous without more content.