The Develop module is saying "Develop module disabled. Please renew your membership to reactivate the Develop module". I bought the product at full price several months ago and have had no problems using it until, so I am not sure what it is asking of me. I only had it on one other computer before I added it to this second computer, and I understand we get 3 copies. There should not be any issues. I need an answer ASAP.. actually pretty shocked that there is no immediate customer service that I can contact for a problem like this.
If the develop module is disabled then you have downloaded and installed Lightroom from the creative cloud. It cannot be licensed with a serial number. It requires a creative cloud subscription, and is activated and kept active with your Adobe ID and password. That version will not work on your computer and will have to be uninstalled. Then you can install from one of these two links:
This will have no impact on your catalog or your images. After you install from the right website you will be able to continue where you left off.