Why is my Adobe Stock account not active, even though I have already registered

Multiple accounts violate the contributor agreement. You are provided a Contact us link. You need to use it to make an appeal.

If you’re asking about creating a 2nd Contributor’s Account, that’s not allowed. See below for more details.

1. https://helpx.adobe.com/stock/contributor/get-started/manage-your-account/adobe-stock-contributor-overview.html
2. https://helpx.adobe.com/stock/contributor/get-started/manage-your-account/sign-up-as-a-stock-contributor.html
3. https://helpx.adobe.com/stock/contributor/get-started/manage-your-account/verify-email-phone-number.html
4. https://helpx.adobe.com/stock/contributor/get-started/manage-your-account/request-exception-multiple-contributor-accounts.html
5. https://helpx.adobe.com/stock/contributor/get-started/manage-your-account/contact-contributor-support-team.html

Also, you incorrectly posted this in the Stock buyer’s forum. This rightfully belongs in Stock Contributors. 

https://community.adobe.com/questions-38

So, how is the solution? 

Have you previously created other Adobe Stock accounts?