Often, this requires running a separate "Patcher.exe" (like RUINER or GenP). This program scans your system for Adobe software and injects fake serial numbers. Once the patcher says "Work Done," you launch Illustrator.
Legitimate Fontself users get new features (like variable font support). Pirated versions are static. You also cannot save fonts to Creative Cloud Libraries. Often, this requires running a separate "Patcher
For these reasons, it's recommended to use legitimate, paid versions of software. it's recommended to use legitimate