Upload Webp image to collection feature image?

[EZ7]

Is it possible to upload Webp images to the collection feature image? Shopify allowed me to in the past but it won't let me now, I am not sure what I am doing wrong. I keep getting this message: 

There is 1 error with this collection:

{:src=>"Error updating collection with this image"}

If it is not, does anyone have tips on image file types that do not pixelate when shrunken or enlarged?

[EZ7]

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