My photos were rejected due tecnical problems, can you please help me understand why?
If you care to post the rejected image here for us to see, we can probably explain why it was rejected.
Inspect images at 100-300% magnification for defects in focus, light, color saturation, white balance, artifacts, noise, grain, etc... If possible, fix problems in Photoshop or Lightroom and resubmit.
Adobe Stock customers expect the highest visual and technical quality for use in commercial projects. Read links below.
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