I have original Due board. On connecting USB, the power led glows and othe orange LED blinks. Device manager also recognises the board on COM port as 'Arduino Due Programming Port'.
However, at IDE 1.8.19, Tools > Board > this board is not found
one error message as below is seen
"Error downloading https://downloads.arduino.cc/packages/package_index.json"
Please suggest how to use the DUE board with this IDE 1.8.19.
( IDE 2.0.4 had different issues in installation and running, so using older IDE)