Image color type is not supported

Hi there,
We are trying to upload custom textures in the Ready Player Me Studio but we always get the Image color type is not supported error.
We openend the template .psd file and even after exporting it straight away to PNG the file is not supported. We used Krita, Gimp and Photopea but non of these export correct files. We tried to setup everything according to the Texture Requirements in the doc’s but it’s not working.

Any help would be appreciated.

i solved it by opening the template.png file in photoshop. putting my new image on top and save it again as png

Hi thanks for your reply, but unfortunately we lose the layers that way.
After a lot of trial and error we finally found a setup that works in Krita, but the colors are a bit different then the original when exporting.