As per my understanding you are trying to open the Board_layout.brd file.
Could you please let me know which software are you using to open the file? This will help us in recreating the issue at our side.
We recommend you to use Allegro or Altium to open this file.
The link to the PSoC 5LP CAD libraries is: https://www.cypress.com/cad-resources/psoc-5lp-cad-libraries
We do not support Eagle CAD. We have libraries for Allegro and Altium.