SQL Intro Missing

[TheTallTech]

Just to preface: Thank you W3Schools for these tutorials!!!

Now on to the possible issue:

In your SQL Tutorial I am unable to view the "SQL Intro" page. When I click on it I keep getting "502 - Bad Gateway." I've tried navigating to it via the "Next" button at the bottom of the "SQL HOME" page but I get the same message. The URL it is trying to access is "https://www.w3schools.com/sql/sql_intro.asp"

I was unsure if this was something others were seeing or just something on my end.