When the blog posts of the old PI Square were migrated to the new PI Square, some links to other blog posts were removed, while others were changed. For a good example of such a mix, see the "Just play the song, Schneebly!" section of this blog post:
https://pisquare.osisoft.com/s/Blog-Detail/a8r1I000000GvSVQA0/pi-square-has-so-many-activities

Unfortunately, the changed links don't work because they use "news" instead of "Blog-Detail" in the link itself. Please substitute "news" with "Blog-Detail" to make these links work again.