If you tried installing a custom ROM and then this problem started, try reinstall GApps, or reflash the modified ROM. Or, you can flash the stock firmware back.
However, if you’re using the stock firmware, then a factory reset should be able to fix it.
Harold
If you tried installing a custom ROM and then this problem started, try reinstall GApps, or reflash the modified ROM. Or, you can flash the stock firmware back.
However, if you’re using the stock firmware, then a factory reset should be able to fix it.