Illustrator The Operation Cannot Complete Because Of An Unknown Error Now -

If the error persists, work through these solutions in order.

View → GPU Preview → toggle to CPU Preview If the error persists, work through these solutions in order

The following essay examines the technical and creative implications of the "unknown error" message in Adobe Illustrator. If the error persists

Try saving as .ai , .pdf , or copy art to a new document If the error persists, work through these solutions in order

If still failing, via Creative Cloud Cleaner Tool.

Navigate to the Adobe Illustrator Cloud Prefs folder in your AppData (Windows) or Library (Mac) and rename the "Adobe Illustrator Settings" folder to "Old Settings." 3. Identify Font Conflicts