Perform a Soft reset of your phone by pressing and holding the Power and Volume Down buttons together for around 10 seconds.
Then put your device on charge for 10-15 minutes.
If this doesn't help, please clear the cache partition on your device by doing the following:
1. Turn your device off, if it isn't off already.
2. Once the device is off, hold the volume up and the power buttons at the same time for 10 seconds. Keep holding the buttons until you see a Samsung logo.
3. Using the volume down button, scroll down to Wipe cache partition.
4. Press the powerbutton to select.
Hope that will help you a bit 😊
