Cannot Disable screen lock Android 6.0(

[AC Question]

Hi I'm trying to use an app to make the lock screen of my Honor 7 to look like iPhone, but to prevent double locking I have to disable the screen lock but the option is greyed out. Now I tried clearing credentials but that didn't work it just says credential storage cleared but the option is still greyed out I have tried everything I have deleted my android device manager and authenticater app and deactivated them in device administrators. I also have seen the guest account way but my phone doesn't have a guest account or if it does please tell me and show me how to access it. Finally here are my device specs:

Model number: PLK-L01
Build Number: PLK-L01C432B370
Android: 6.0
Device name: honor 7
Everything else is stock and is not rooted.