Hello @mario_leal,
Would you mind trying the following steps and checking if they help:
- Close all Adobe applications.
- Rename the UXP folder to UXP.old from the following location:
(Windows) Navigate to C:\Program Files\Common Files\Adobe\UXP
(macOS) Navigate to Macintosh HD/Library/Application Support/Adobe/UXP
- Relaunch Illustrator
Looking forward to hearing from you.
Anubhav