I actually have two problems.
1. Battery saver won't turn on,its greyed out and no setting in battery settings for it.
Tried supportss suggestion of graphics test,never worked.
Drained battery to under 15% and selected to turn on battery saver and it activated but when recharged it wouldn't come off. Had to factory reset to get it off.
2. Multiple users isnti working either,the setting is there but nothing happens when I press it.
Nokia 7 plus,android 9, January update.
Any help would be great thanks.