Swift problem with URLSession in Watchkit XCode - ios

Question

I got a problem with UrlSession and a .local domain.
When I send a Request to the IP address of the device in my home network it works. But when I use the .local domain for example "http://esp8266.local" it don't work and there are some errors.
On the IOS App it works fine.
This doesn't work on Watchkit but on IPhone App it works fine:
PDTask .<1> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_NSURLErrorFailingURLSessionTaskErrorKey=LocalDataPDTask .<1>, NSLocalizedDescription=The request timed out., _kCFStreamErrorCodeKey=-2102, _NSURLErrorRelatedURLSessionTaskErrorKey=(
"LocalDataPDTask .<1>",
"LocalDataTask .<1>"
), NSErrorFailingURLStringKey=http://esp8266.local/, _kCFStreamErrorDomainKey=4, NSErrorFailingURLKey=http://esp8266.local/}
let url = URL(string: "http://esp8266.local")
var request = URLRequest(url: url!)
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request) { data, response, error in
print(response!)
if error != nil {
print("FAIL")
print(error!)
} else {
print("OKEY")
print(data!)
}
}
task.resume()
And this works fine:
let url = URL(string: "http://192.168.0.109")
var request = URLRequest(url: url!)
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request) { data, response, error in
print(response!)
if error != nil {
print("FAIL")
print(error!)
} else {
print("OKEY")
print(data!)
}
}
task.resume()