Enter Password for credential storage

Hi, I'm getting the following message on a Galaxy Samsung J1 device when in the lock screen "Enter password for credential storage". I've checked all the obvious permissions and can't see what may be causing it. The logs suggest something re the password? I've got other devices with the same profile "Core Prime" but the message doesn't appear on those? Client version 13.5 Android 4.4.4 Has anyone got any ides on what may be causing it? 2018-08-13 16:01:41.106|pool-1-thread-1|I|AP|[PasswordOrPolicyChangedListener.ensureKeyguardQuality][run] Requesting keystore unlock ..|2018-08-13 16:01:41.175|pool-1-thread-1|D|AP|[BlacklistChecker][isBlocked] component: ComponentInfo{net.soti.mobicontrol.elm.samsung/net.soti.mobicontrol.device.security.KeyStoreUnlockActivity} is allowed settings component: true|2018-08-13 16:01:41.196|pool-1-thread-1|D|AP|[KeyStoreUnlockActivity][doOnCreate] this activity just starts another android activity|2018-08-13 16:01:41.219|pool-1-thread-1|W|AP|[KeyStoreUnlockActivity][onActivityResult] keystore state=REQUIRE_STORAGE_PASSWORD|