Photoshop prompts for serial number after purchasing photography subscription

Question

Hello, recently I got photography subscription. After signing into cloud photoshop asks me for a serial number.
I had a chat with adobe representative who recommended me to contact tech support, he stated that on Adobe side I have no subscription registered (though I have one in my user profile and I have an order id).
On contact page it's been said that support is overloaded, so here I am ...

Answer 1

The My Products may only show things that have been registered, which you cannot do because PS-CC is asking for a serial number, so maybe it is normal that nothing is listed, there, yet.
Check for evidence of your subscription, here, in the orders section:
https://www.adobe.com/account/account-orders.html
For mine, I see both a subscription purchase confirmation and a list of the monthly transactions, similar to what is listed in two parts on creative.adobe.com.
If nothing is listed at this www.adobe.com link then there may be a purchase problem due to non-Adobe payment order servicer, and you may find relief with someone like the Beverly that seems to fix people's purchasing/credit-card issues, after they post to this forum; however, your forum-post subject, which mentions serial-number problems, not purchasing problems, suggests a tech-support solution so it may be overlooked by someone like Beverly.
If something is listed for your purchase on www.adobe.com then the issue could be a problem with licensing or the CC Manager app data stored on your local computer, whatever is making PS-CC think it needs a serial number, and probably someone from tech-support needs to connect remotely and hack something to get PS-CC to figure out you are licensed.  Usually logging out and back into the CC manager is enough to have the CC Manager rescan and figure things out, but that is usually for cases where a serial-number isn't being asked for and the CC Manager app doesn't see that PS is licensed.
Another thought is that maybe the type of purchase you made via DigitalRiver does have some sort of serial-number associated with it that would be included in some order confirmation correspondence, so check any e-mails or digital-receipts that you received as part of the order process to see if a serial-number is listed.
Finally, where did you get the version of PS-CC that you installed?  If it was not from the either a button in the CC-Manager app or an icon on the creative.adobe.com pages then it may be the wrong version and the fix would be to uninstall what you have and download and install the CC-Manager/Creative version, and it might be worth doing this, anyway, even if you do think you installed the right version, in case something didn't quite work in the first install.  I don't know if your European location would cause the wrong version to be downloaded.