The domain cdn.osisoft.com is used to store some of the downloadable content for OSIsoft Learning, such as the workbooks of all instructor-led courses and the infographic linked below that is referenced from the OSIsoft Learning section of the feedback website.
http://cdn.osisoft.com/osi/infographics/OSIsoft-learning-infographic.pdf?_ga=2.87749400.1055004684.1555988848-382715633.1548508508

Whenever links from cdn.osisoft.com are used, they are the HTTP version, which wouldn't be so bad if cdn.osisoft.com redirected from HTTP to HTTPS.

Please fix both issues. Replace the HTTP links with their HTTPS equivalent and redirect HTTP to HTTPS on cdn.osisoft.com