here some links as an approach to solve your problem:
even if about Lightroom Help/Doesn't launch after 5.5 update | "Develop module is disabled" error these the instructions could althoug be helpful
Thanks for your help. Following the instructions as per Lightroom Help
did not work if I applied them individually. What seemed to work was
applying Solution 2 then Solution 1. This worked immediately after
these actions but when I logged out of Lightroom and then back in the
dreaded "Develop module is disabled" came back to haunt me.
You have to wonder whether Adobe really care given the length of time
they have been aware of the problem. They never fail to take my
subscription on time!
I have the solution.
Many CC users will have legacy copies and leftover registration data of the standalone LR version on their systems. Simply delete the CC version of LR, download the standalone version ( search for it on the Adobe site) and problem fixed!
Did not work for me but thanks anyway.