Things to check:
- Make sure that all are licensed. If they are not licensed you see a license dialog in following;
a) Joomla back end >> Components >> Paid Membership Manager
b) Joomla back end >> Plugins Manager
If you also have our Advanced Profile rights control extension, check the following:
- This file should have correct permissions:
/libraries/joomla/database/database.php
(normally 644). It should not be read only. If it is read only, please make it writable. Then go in plugins manager, disable jomsomu system plugin and enable it again.