Solved Problem with Adguard for Android after uninstalled

[void011]

I installed Adguard for Android then unlocking lockscreen by swiping (as well as no lockscreen, Signature) was disabled (it's ok).
Now I uninstalled Adguard. Its certificates were also removed.

The problem is swiping lockscreen to unlock (as well as no lockscreen, Signature) is still disabled.

I'm on Android LP.
Anyone explain how this happens and solution if possible please? Thanks in advance.

 

[Alkajak]

The only time I've had my Android disable those choices is after I encrypted it. Have you encrypted your device?

 

[void011]

I didn't. The problem just happened right after I installed Adguard and not changed untill now even after I uninstalled it.

 

[SHvFl]

Did you go in your phone settings and enable the lock screen again?

 

[Alkajak]

Settings > Security > Clear credentials

Let me know if this works.

 

[void011]

Did you go in your phone settings and enable the lock screen again?

I did

@Alkajak it works! Thank you so much!
Before that I went to Settings > Trusted credentials, and remove Adguard's context in User (not sure if every rom is the same, there are System and User tabs in this option). I wonder if Adguard also added its credentials to System?
Once again thank you!