Screen Lock. Lost the "None" option in 5.0

[TheBungle]

Playing with every setting under the sun and now the "None" option has disappeared. I've tried everything I can think of to get it back but am out of ideas. Anyone encounter this? I don't actually like having to swipe up or enter a pin etc.

 

[B. Diddy]

Welcome to Android Central! Are you encrypted? Have you tried going to Settings>Security​ and tapping Clear Credentials?

 

[gone down south]

Close out the guest account.