Demo content for player facing sector is not in PDF format and thus unviewable, please attempt to fix if possible.
Viewing post in The Long Rim: a Lancer Setting comments
The demo isn't supposed to be a PDF, it's support files for COMP/CON, the browser-based character builder. You load it into COMP/CON and then you can use the mechs, talents, etc. from the book.
https://compcon.app/#/