arduino ide - Set board manager as ATmega16 - Arduino Stack Exchange

i tried download atmega16 board in arduino. have set below url under file->preference->additional board manager url

https://mcudude.github.io/mightycore/package_mcudude_mightycore_index.json

i getting below attach images. how can resolve error , install atmega16 board manager?

i using arduino version 1.6.9. don't have issue in opening mightycare , arudino url chrome browser.

thanks here.

i have resolved few steps.

1) file -> preference -> board manager url below. url seperated commas. http://arduino.esp8266.com/stable/package_esp8266com_index.json,https://mcudude.github.io/mightycore/package_mcudude_mightycore_index.json

2) deleted tmp file (package_index.json.tmp) in path c:\users\simbu\appdata\local\arduino15\

this helped me resolve issue.