Why this AI image was rejected?

Besides what others have said. there are many Artificats like the person not having hands, head not attached..etc and other blurrly or areas with artifacts.

you should examine your pictures closely and edit them properly in Photoshop (or any other photo manplating programs) because Although midjourney uses advanced Ai technology, it will make mistakes. i have never uploaded an image straight out from midjourney/ stable diffusion, i always edit ( content aware, removing few things, lighting & shadows..etc). but my advice here is to remember to balance the time needed to edit an Ai image or just discard it ( if it's not worth the editing time).

and as danielle mentioned, once you start getting into the habit of editing and selecting your images you will develop a very good eye for spotting mistakes and your acceptance rate will hugely improve

good luck.

While Midjourney is often touted as the best AI platform presently available, it still has many shortcomings, among them being landscapes and wide angle surrealistic images in particular. While you should indeed inspect images at 200%, I go even further with images of the nature you posted here: 300% after upscaling. They might look great at their original size, but defects that are not apparent original are multiplied when upscaling. I prefer upscaling to a minimum of 20" on the long side at 300 dpi. If the defects that become apparent don't look fixable with a reasonable amount of editing, it's  consigned to the trash. Once you're in the habit of moderating your own images, rather than relying on someone else to moderate them for you, your acceptance rate will improve.

The head of the person is not attached to the body.

You should always indicate the refusal reason given to you by Adobe. Post the picture here as indicated. Check your pictures before submitting at 100% and 200% for artefacts. 

This picture is exposing many compression artefacts around objects and typical colour banding of a too low quality factor when saving JPEG files. There are also strange ghost pictures that may or may not be considered defects.

If you are new to stock, you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html

Hi,

besides that what Ralph said.

Before you submit, please review the submission guidelines carefully and compare your work with other Stock inventory. To be accepted, your work should be as good or better than what's already represented in your keyword category.

https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html  https://helpx.adobe.com/stock/contributor/help/photography-illustrations.html
https://helpx.adobe.com/stock/how-to/tips-stock-image-acceptance.html
https://helpx.adobe.com/stock/contributor/help/editing-dos-and-dont.html
https://helpx.adobe.com/stock/contributor/help/vector-requirements.html
https://helpx.adobe.com/stock/contributor/help/generative-ai-content.html

If its generative AI based, please look into these instructions and follow them to the letter: https://community.adobe.com/t5/stock-contributors-discussions/generative-ai-submission-guidelines/td-p/13549435

Hope that helps.

Blurry and it appears to have artifacts around the dark and light areas.