This was rejected by the automated process. We don’t know exactly how this machine learning model works, but I suspect it may have had trouble understanding what you were submitting. The table is blending into the background. You can either appeal this rejection, or try again in a new nomination.
If this is a single table among many tables, and the picnic area is a game location already, I would probably not pursue this. Here is a clarification on picnic areas: Picnic Areas
If you are considering appealing, you may want to post the entire contribution here to get advice on whether there are any issues with the text or pin. What I can translate from the piece of description shown seems fine. You get 2 appeals, each on a 15 day timer before they can be used again. Even on appeal, sometimes these are rejected. If they are, @frealafgb has had some appeal rejections get reversed by asking about the rejection here.
If you resubmit, try to get a better focus on the table. I like to take my photos first so I can look through them on my gallery. Especially with a tall phone like this, I would crop this photo to put the emphasis on the table while still showing enough of the surroundings for context. Square photos look great in Pokemon Go both on the disc spinner and on postcards.
This is the kind of photo I would try:
