Compile error for board NodeMCU 1.0 (ESP-12E modules).

Hallo everybody,

i would like to compile my sketch in the arduino IDE. Till yesterday the sketch still worked. But now i cannot compile my sketch. I haven't changed anything in the program.

I have copy the url:"http://arduino.esp8266.com/stable/package_esp8266com_index.json" in the presets.

This is my board: NodeMcu 12E


A picture ist in the attachment

please can you help me
I did not find the right solution from the internet.

References:
https://forum.arduino.cc/index.php?topic=617037.0
unlock Exemples.

Any help will be appreciated.



Thank you