Please accept my sincere apology for the inconvenience. Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator
An error occurred while saving the commentyeabtsega commented
I upgraded to the latest illustrator(2019), but it crashes frequently while I am in the middle of working. I tried re-installing it but the crashes did not stop. I found a loophole that might help though. Go to Edit> Preferences> and set the data recovery time to 30 seconds. And make sure to hit CTRL+S ( save) every now and then, like every two or three minutes... I hope it helps.