I had to go somewhere and due to my paranoia, I decided to lock my Huawei P8 Lite. Since that day I can't disable the password beacuse I always get this note Disabled by administrator, encryption policy, or credential storage
The only Device administrator is Google's Find my phone, which I deactivated and is not the problem (so I switched it back), I cleared all credentials from Security, I really don't know what else to do.