Are you getting LaTeX errors when compiling the Open Logic Project files? If you get this one:
LaTeX Error: \memendofchapterhook undefined.
it means you have an old version of the memoir class installed. Get a new version from CTAN, or update your TeXLive or MacTeX distributions.
If you get another one, make sure you have the most up-to-date version of OLP installed. If it persists, please file an issue on GitHub, and attach the .log file of the file you’re trying to compile.