Well, Adobe did give you a reason: "Technical issues" is my guess.
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
The histogram shows a highly underexposed picture:

With a few clicks, you could get an acceptable image out of this.

You would, however, need to do some noise reduction as correcting the exposure will introduce a high noise amount.
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