Hi Nguyen,
The Learning Path is designed to work in an older version of Mendix as stated in the Welcome page.
You can download the version via https://marketplace.mendix.com/link/studiopro/9.12.4
I tested it there and it will run. Upgrading and running in Mx 10.3.1 will cause this error (deprecated API)
The Mendix Academy content creators are continuously updating the learning paths making sure they will use more recent (either MTS/LTS or 'latest') versions, but it is not sure when they will be able to work on this specific one. So I would recommend following the LP in the suggested Mx version.