The issue with the McGill Software site (user login error) was resolved on Wednesday, August 7, 2019.
Original Announcement posted on Thursday, August 1, 2019:
There is currently a problem on the McGill Software site (www.mcgill.ca/software). An error message appears when you attempt to log in with a valid McGill Username and Password. Users are unable to download software or access license information. We are working to resolve the issue.
Thank you for your patience.