Transparent .png causes crash in IDE (SOLVED)

I tried to add a transparent 16x16 png file to an atlas, and get this error:

49

I was going to use the png in a GUI, because I read somewhere on the forum that if you have empty nodes, it’s a good idea to at least assign it an empty bitmap texture.

What is the format of the texture?

This is is the culprit in question: (empty16x16)

$ file ~/Downloads/totebo.png 
/Users/mathiaswesterdahl/Downloads/totebo.png: PNG image data, 16 x 16, 1-bit grayscale, non-interlaced

That’s not a format we support.
(It’s ofc unfortunate that the editor behaves this way)

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Oh dear. Must be my png compressor that stripped it to within an inch of its life. Poor thing. Thanks for the explanation!