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After activating Bluetooth and opening settings, I try to activaye a bluetooth connection and the message above appears.
Phone: XPERIA L C2105
Android Version 4.2.2
Build Number 15.3.A.0.26
Force restart the phone(power button+vol up until the phone vibrates).
Since the phone have an removable battery force restart will not work. Try to remove the battery for a while.
If you still experience problem, try to boot your phone into safe mode to see if the problem may be related to any 3rd party app that you have installed in your phone:
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
Thanks,Alexander.It might be an app acting up or he could just clear data for settings-apps-all-settings.
I experience the same problem on Sony Xperia Z1 Compact when I try to enter Personalization - Manage Notifications.
None of the above listed steps have helped so far.