Rejected for technical reasons

Just looking at your first picture, I see that the highlights are too harsh and are illuminating your main subject incorrectly (for photography). To counter this, you would probably have needed a strobe pointing to the canon.

Then look at the histograms:

The histogram shows that all the information is concentrated in the blacks (left). This is  to be expected for night photography, but you have room for improvement:

The corrected exposure shows a more equilibrated histogram, with information distributed over the whole range.

The effect can be seen here:

It will probably still get a refusal, however, because of the disturbing light sources, especially that under the cannon, that really need to be avoided. I think the canon should be positioned more to the left. Not a lot.