Problem in Downloading ESP8266 Board Manager
After press install button, I am getting downloading error for all versions as
<font color="#990000">error downloading https://github.com/esp8266/Arduino/releases/download/2.6.3/esp8266-2.6.3.zip</font>
Arduino Wireless-Connectivity-to-Arduino 05-06 min 50-60 sec
Copy paste the URL which is given to you. You must have deleted one or two characters from the given link.