iTunes connect does not accept my large app icon

Question

I have submitted a large app icon to iTunes Connect that meets all the specifications: .png file, 1024x1024 pixels, etc. and yet I still get the error:

"The large app icon you uploaded is not valid. It must be a .jpeg, .jpg, .tif, .tiff, or .png file that is 1024 x 1024 pixels, at least 72 DPI, and in the RGB color space."

I created it using Photoshop Elements. Any guidance is greatly appreciated.

Update - problem solved:

I have tried it again. It worked. Did not need to se exported as PNG or TIF and I am not sure exactly what was different this time (after 4 hours of trying), but it uploaded.

Answer 1

The command below is a hack to base-line PNG images and format them "them Apple way". Use the following in command line (Terminal), changing "/path/to/image/folder/" to match the location of your PNG files:

sips --deleteColorManagementProperties /path/to/image/folder/*.png