Downloading and installing the new Arduino IDE for ESP8266

Moderator: igrr

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By sckam
#68178 Hi, may I know anyone have this problem before ?

Error downloading…/package_esp8266com_index.json

And out of sudden no ESP8266 boards available to choose in the board drop-down menu.

I am using Arduino IDE 1.8.3, at the Additional Boards Manager URLs:…/package_esp8266com_index.json

At the bottom of the IDE, the warning message: file signature verification failed. File ignored.

I have uninstall and re-install back the Arduino IDE, still same problem.

Kindly advice how to fix the above problem.

Thank you.
Best regards.