Failure to download artifacts: cannot add/update some packages!

Try this:

  1. Download the OpenSSL artifact using your browser
  2. Extract the contents twice, e.g. using 7-zip
  3. Create a new folder in C:\Users\NAMENAME\.julia\artifacts, and name it 8b5673894767bc39a7d0dfdad9c9c083fd9fe304
  4. Copy the three folders bin, include, and share from the extracted folder to the new folder
  5. Run julia>]add HTTP again