I just tried to use the laboratory books and boy, it did not end well.
There seems to be a problem with \experiment, as I get a bunch of errors whenever I include it. Most of them are rather generic and probably errors thrown because of some main error , except for this one:
Paragraph ended before \fk@@getatdashsep@list was complete.
Other commands from the custom labbook class, like \labday work perfectly fine.
On CTAN someone commented that the package broke with TEXLive-2018. :<
I hope someone with more knowledge about document classes can help to fix it, as I don't know what to try
