This is the translation in english:
Disabled by administrator, encryption policy, or credential storage.
So you either installed an app that forces this, you encryped your device, a setting you set on or something similair.
It can be multiple things.
Samsung Galaxy S 4 I9505 | WanamLite v3.0
Samsung Galaxy S II I9100 : AOKP 4.2.1
HTC Touch Pro2 | ROM: Valkyrie 6.5.23115TR2.5
HTC HD2 | DarkStone1337 [FroyoStone Sense - V3.2]
HTC Desire : Oxygen v2.1.3