Clear credentials greyed out and I would like to remove/change pattern lock

[Daliixx]

i just changed from andoird 4.2.2 to 4.4.2 but when i wanted to make pattern/password it says Disabled by Administrator encryption policy or credential storage.
i watched some videos about cleaning credential but clean credential greyed out as you see in the screenshots.
so if possible i want someone to help me.

 

[Daliixx]

i still have the same problem pls help!

 

[B. Diddy]

Did you ever encrypt the phone? Or is it associated with any work accounts that might require you to have a certain kind of password?

 

[Daliixx]

no i didnt encrypt it also i just upgraded it from 4.2.2 to 4.4.2 then i find that i have only that problem i tried alot of ways but i still have the same problem.

 

[B. Diddy]

Which device do you have, and how did you update it? Was it an official OTA update pushed to the device, or did you manually download the firmware from a website and install it yourself?

 

[Daliixx]

well my device is galaxy s4 mini gt-i9190
i updated it with odin 3.10
i downloaded the firmware from https://www.sammobile.com/ and its an official firmware but yes manually.

 

[B. Diddy]

I wonder if it has to do with that firmware. Can you re-flash the original 4.2.2 and see if the problem goes away?

 

[Daliixx]

yes i tried that and it got fixed but i liked 4.4.2 most of applicants works only for 4.4.2+

 

[B. Diddy]

There are a lot of regional variants for the firmware on the SamMobile site. Are you certain you had installed the exact firmware for your variant?

 

[Daliixx]

ofc its the right firmware for my variant

 

[B. Diddy]

Hmm. not really sure what to try next. What happens if you uncheck Android Device Manager and S Voice temporarily in Settings>Security>Device Administrators​?

 

[Daliixx]

well i tried that aswell and nothing happend.