I have purchased the Spine Pro subscription, but when I try to "import data" and choose any .skel file, the 'skeleton' so to speak properly loads, but none of the images. I just see lots of red boxes that says "missing" and I get an error message that say "nonessentials not checked when exporting, internal edges lost for mesh attachment: [name of image]" a bunch of times. I am in the proper version 2.1.27, power of two is off and the max width and height are also correct.

I also have no clue how Spine even works. i know that somehow the game splits every .png file up into sections but I don't know what they are called or in what file it is done. And what is the mesh and why is it so important?