Can't export Artboards anymore as PNG
For some weird reason, today I was trying to export several artoboards as PNG with transparency, and I'm getting this error message:

I've saved these artboards before without an issue. Tried another file tht also has multiple artboards, same error.
Tried different settings (selected artboards vs all artboards, transparency vs include background, png-8 vs png-24). Nothing works.
The problem goes away when saving as JPG.
Can someone help me with this?
Thank you!



