"Can't Finish Previewing. Cannot complete requested operation."

[#1]

When I add a stroke to a specific shape, the error: "Can't finish previewing. Cannot complete the requested operation." I am running macOS Catalina 10.15.7 wuth 40GB of RAM so shouldnt be issue of memory. Why could this be?

[#2]

Got a picture?

[#3]

[#4]

After I click "OK", it then goes in to outline mode.

[#5]

Those are about a billion anchor points.

You need to simplify that artwork.

[#6]

That's because its an image that I imported from Fresco to illustrator. Not sure how to avoid all of the anchor points. I could easily redraw, but I am trying to keep the feel for the vector drawing in fresco. 

[#7]

Try Object > Path > Simplify.

If you have Astute Graphics VectorScribe, try their Smart Eraser.