Hi, what version of Adobe Illustrator are you using? Could you list the features of your computer?
Hi, I'm using version 2021
It looks like on of the fonts Illustrator is using for this is missing, most likely a font that is installed with the application. Did you try to de-install and reinstall Illustrator?
I did but it didn't work
Please check that the following two fonts are properly installed and active.
Font Verdana (Four faces, regular, bold, italic and bold italic) and Font Tahoma (Two faces, regular and bold). These have been used for many versions of AI.