The slides for the grammar theory text book / lecture
The book can be downloaded from Language Science Press: https://langsci-press.org/catalog/book/287.
The tex-code should work with TeX live 2020.
In order to compile the slides, you have to put the files in the styles folder into your LaTeX path. The easiest way to do this is to include ./styles and everything below it into your tex path. For tcsh this works as follows:
setenv TEXINPUTS .:./styles//:${TEXINPUTS}.: