I am using the package classicthesis (https://www.ctan.org/pkg/classicthesis?lang=de). Compiling the sample file included in the package with pdflatex works fine for me. Since my document includes several large pgfplots, I will ultimately need to compile the file with lualatex.
Trying to compile the sample file with lualatex, however, results in a lot of "undefined control sequence" errors.
Any guidance on how to adjust the config file for lualatex would be highly appreciated.