Unknown reason of Design rejection

From what you’ve shared, your design was rejected mainly for non-compliance with Adobe Stock rules, and it isn’t unusual for first submissions to be rejected if any part of the design triggers their system or moderators. In your case, there are a few clear issues:

1. Use of another brand’s logo or name – Using “Twitter” or the old logo counts as intellectual property (IP) content, which Adobe Stock doesn’t allow without permission.

2. Frame or vector issues – Sometimes even a small formatting or vector structure problem can trigger an automatic “non-compliant” flag.

3. Generative AI content – If any part was AI-generated and not declared, it can also be a reason.

The moderators typically stop at the first reason they find, so they flagged the frame first. If that were corrected, the IP issue with the logo/name would likely cause a rejection next.

For beginners uploading digital designs, it’s similar to the way beginner-friendly tools handle workflow mistakes: following clear guidelines and using original content prevents these automatic rejections. A resource like https://thepaint3ds.com emphasizes creating your own elements and templates, which helps avoid IP or compliance issues.

You'll need to follow the guidelines tightly at :https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html or else you'll face rejections.

Make sure to adjust the shodows, colors and you must consider not adding frames and before submitting your final design you muist adhere the specifics. 

Adobe did give you a reason for the rejection. Even if you do not know what that means, it does not mean that the refusal is for unknown reasons. You should always tell us the rejection reason that Adobe gave you.

You have also put a frame around the image which isn't allowed.

This is the logo for X (Twitter). Did you submit it under Editorial? Even then, companies generally have very specific requirements for how their logos are presented in the media.