10-19-2023, 05:05 PM 
	
	
	
		I'm on Windows.  Layer names have spaces but no punctuation.
But I figured it out! The image mode was Indexed. When I switched it to Grayscale, it works fine.
	
	
	
But I figured it out! The image mode was Indexed. When I switched it to Grayscale, it works fine.

 

