Soft eLicenser issues possible fix

I have already registered my licence for Cubase 9.5 Pro on Windows 8, 64 bit system. When I start the programme it says No Valid license found. The programme will quit now. I did ran the maintenance at elicenser Control Centre.
When I re entered the activation code, it is not accepting as it has already use it to generate the license.
Grateful if you can help to solve the issue.
Looking forward to hearing from you soon.