Posting as other people may well have the same alert today that I got in a email notification of a vulnerability in nokogiri yesterday -  Known   high severity   security vulnerability detected in   nokogiri < 1.10.4   defined in   Gemfile.lock. Gemfile.lock   update suggested:   nokogiri ~> 1.10.4. The link in the email goes to github but the page returns a 404 which is not very user friendly for the first time you get an alert - until I logged in and then I saw the alert show up.   Anyway, it looks like I just need to update gemfile.lock and update the nokogiri reference. I'm assuming that all references need to updated? Also clicking on the automated security fix gives me an error that the page is taking longer than normal to load.   Edit: After the automated security fix did not work I then tried enabling fixes on the repository and this then tried to create an automated fix PR but this also failed as there were conflicting dependencies. So I went ahead, changed all references to the file to 1.10.4 and then the alert went away. So the fix was pretty easy, but the automated solutions had a couple of issues trying to resolve the issue. ... View more

When I click Join this Course on the introduction to GitHub page, The screen refreshes and displays a pink bar with " There was an error registering for this course. Please reload the page and try again."   I am signed into Github at the time (as you can see from the gravatar.) Unfortunately the error message doesn't state what the problem is and reloading and attempting to rejoin doesn't fix the issue. Issue occurs in both Chrome and ie. I do have 2fa enabled on my account just in case this makes a difference but as I'm already logged in I doubt it? ... View more