Please accept my sincere apology for the inconvenience. It can be issue with Graphic card drivers. Please goto this link for more info:
If this doesn’t resolve the issue, 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.
67 votes52 comments · Illustrator (Desktop) Bugs » File Save, Import and Export · Flag idea as inappropriate… · Admin →
Please update to version 22.0.1 to get the fix for this issue.
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator
An error occurred while saving the commentMike Fitzpatrick commented
I use Export As...to 300 dpi daily. I've been having to use work arounds for a month now and it's slowing productivity. Can we get an update for the PC version please....preferably sometime this year.