I go to Edit role page [Users >> Permissions >> Define roles] and adjust permission i want. After finish all i click save changes button and Moodle show me some error like screen shot i attached to this post.
Roles and permissions
Can't update role's permission.
གྲོས་བསྟུན་འདི་བསྡམས་ཡོདཔ་ལས་ ལན་གསལ་བརྐྱབ་མི་ཚུགས་