Since upgrading to 3.1.1 on our webserver, certain functions - Users, Reports, Badges and Switch Roles are not functioning.
I am also suddenly not able to access Site Administration.
Suddenly the enrolled students are not visible when I select Grades.
The upgrade was completed over weekend 21 to 14 July.
If I restore the backup made before the upgrade, I realise that any submissions or work completed by students will be lost.
What can I do to get back to working smoothly.