"Illustrator tried but could not save the file in AI format"

[Audrey237748284zcs]

I downloaded Illustrator to my Macbook Pro for an online graphic design class. My teacher requires me to submit my work in AI format. Every time I go to save my work in AI format I get a pop up window saying "Illustrator tried but could not save the file, click learn more to try alternate options for saving your file". I have been saving my files and submitting them in EPS format, but I have been losing significant points on my assignments. I am not a computer expert so I have no idea what to do to resolve the issue. I have done much online research but no solution has presented itself. It has nothing to do with the fonts I am using because I cannot even save a blank document in AI format. Any ideas? 

[Ton Frederiks]

Audrey,

Try to turn OFF Preferences > File Handling > Save in Background.

[Anshul_Saini]

Hi @Audrey237748284zcs,

We are sorry for the trouble. This issue has been fixed in the latest Illustrator update, v26.2.1, released yesterday. I would request you to turn on the "Save in background" setting after updating Illustrator and let us know how it goes.

Regards,

Anshul Saini