par Sally Clough.
Hello,
The Windows platform is IIS and MySql.
Prior to the upgrade I could add both users and courses.
Firstly, I upgraded from 2.3.2 to 2.5. But I could not add courses or users. So I went back to backup and reinstated 2.3.2 all was working. I then upgraded to 2.4.5 (as an interim) - but still the same issues.