I finally was able to access the above link. After taking a look at all the changes required I understand why you did not post it here.
I was able to login by putting in the changes for just line 185, although the remaining changes (a lot) have to be applied for the blog to function properly.
If others are having the same problem and cannot access the site, I converted the page to a PDF file (14 pages long including comments). The PDF file can be downloaded from:
https://www.davidpleasant.net/wp/login_fix.pdf