Wemos D1 breaks off connection

wemos D1 aborts connection since today I do not know why else it always worked

#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "0c60d34ee40f8ae";

char ssid[] = "h";
char pass[] = "9153";
// Your WiFi credentials.
// Set password to "" for open networks.

void setup()
  // Debug console
 Blynk.begin(auth, ssid, pass);

void loop()