Hie.
Normally this would be caused by overloading the RAM or Cache memory and can simply be solved by rebooting the device. From there, clear the cache memory for the Go Launcher and Locker in your Task Manager, and clear defaults (assuming that the device is functional now), then clear the RAM and kill all unnecessary tasks happening in the background if you have any.
Should the problem persist after this, please comment again below and I'll see if I can help you further.
Normally this would be caused by overloading the RAM or Cache memory and can simply be solved by rebooting the device. From there, clear the cache memory for the Go Launcher and Locker in your Task Manager, and clear defaults (assuming that the device is functional now), then clear the RAM and kill all unnecessary tasks happening in the background if you have any.
Should the problem persist after this, please comment again below and I'll see if I can help you further.