Problem Illustrator 24 does not support the old PANTONE libraries
I tried to follow your guide: https://helpx.adobe.com/illustrator/kb/pantone-plus.html, that I always used to insert the old PANTONE libraries and have a conversion to CMYK instead of LAB and in this version it doesn't work.
I contact the online chat and they replied that this thing with ILLUSTRATOR 24 is no longer supported, and it is absurd.
I also tried to install the prereleas 24.0.1 but it doesn't work.
I can't work without this.