Rejected due to technical issues

Love the color and symmetry, but it looks a bit dull and muted; with just a few minor tweaks in LightRoom it looks much crisper. Increase exposure slightly, raise the shadows a bit, set the white and black points, and apply a bit of dehaze. I assume you have a Property Release? Otherwise, even if you overcome the technical issues, it will be rejected based on IP violation.

Examine your original image at 100-300% magnification.  That's when imperfections become more noticeable.

The exposure levels are uneven.

https://helpx.adobe.com/photoshop/how-to/correct-exposure-photoshop.html

And the white balance is not neutral (too cool).

https://www.adobe.com/creativecloud/photography/discover/white-balance.html

Hope that helps.

For some reason the preview is horribly blurry. That´s definitely not the case :D.