I don't know where else to ask this but I routinely encounter broken links to material on KeyboardMag.com. My latest encounter is here: https://www.keyboardmag.com/lessons/the-art-of-synth-soloing-dennis-deyoung-of-styx
Not only is the link that a Google search returns for that article dead (it was in the "howto" section) but more importantly the links to sheet music on the page itself don't work anymore. Where did those files go?
If KeyboardMag.com truly wants people to easily find its material then it needs to stop moving things around.