In the repo, they suggest that you instead go support another project. Namely, <a href="https://github.com/glinscott/leela-chess" rel="nofollow">https://github.com/glinscott/leela-chess</a>
If anybody is interested, you will find ~300 millions PGN to train your NN models on chess games here : <a href="https://database.lichess.org/" rel="nofollow">https://database.lichess.org/</a>