Hej. Moje zdjęcie zostało odrzucone przez "problemy techniczne" nie do końca rozumiem dlaczego.

Your picture is underexposed as shown by the histogram and desaturated.

You should le the buyer decide on the editing and provide him with a “technically” correct image. Nobody can recover exposure or saturation if that is gone.

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