A. Wipe Cache Partition. Steps to perform. 1) Turn off the device. 2) Press and hold the Volume Up key and the spower button. 3) When the Android logo displays, release all keys. 4) Press the Volume down key to navigate and select "Wipe cache partition". 5) Press Power key to select. When the wipe cache partition is complete, Select Reboot System. 6) Press the Power key to restart the device.
B. go to safemode and observe is there same issue in safemode too if not then problem may due to other downloaded apps and if same issue in safemode then try to visit service centre and get reinstall your software update
steps to turn safemode; long press on power button> long press on power off option>click on safemode >your mobile will restart and turn into safemode.
Keep in mind that in this mode only inbuilt system app will work