Pls explain "technical issues" on these photos??

I don't see much commercial value here.  Stock customers come here seeking high quality images for use in professional projects, e.g. posters, brochures, t-shirts, coffee mugs, billboards, movies/TV, commercials, templates, etc...

Read the links below:

• https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
• https://helpx.adobe.com/stock/contributor/user-guide.html/stock/contributor/help/photography-illustrations.ug.html
• https://helpx.adobe.com/stock/how-to/tips-stock-image-acceptance.html

The tiny thumbnails you've uploaded will not allow the Community members to properly evaluate the images; however, just at a glance I can tell that lack of sharp focus is the primary issue.