Why my image was rejected

Hello,

You have a problem with the white balance - it's too green.

You need to reduce the green tone somewhat to something like this:

Using the tone curve (in Lightroom/Photoshop), you can isolate the RGB channels and balance the colours.

To remove the haloing @RALPH_L mentioned, here's a quick video showing how to remove it.

https://drive.google.com/file/d/1bBE18yUWdScLGHq5GPLc4fkmD3wZ4ofz/view?usp=sharing

when magnified to 205x, a halo can be seen between the mountain and the sky.

There is a noticeable lack of detail in the greenery. I note that your file name says "upscale". It's not necessary, or recommended to upscale photographs. All modern cameras have sufficient resolution already. Additionally, the file type should be jpg not png.

I like the photo but maybe the shadows could be opened up a bit. To be honest, based on the number of contributors looking for feedback lately, Adobe's standards seems to have become even stricter than it has been in the past.