After the update 757, my play store can not update apps and difficult for downloading apps, I also have done a factory reset after the update. is there a solution?

I give up, 2 times I update 757, 3 times factory reset. My play store still can not update or install app. I don't know what's wrong. I've try clear data n cache on google play store, google play service, download manager. I also try fix n repair. My play store still not working. What should i do? Please need help.

before 757 everything is ok, only bug sound.
i hope sony release a new update again to fix

new account? already try
date n time? already check
but still same. play store not working

already try also

there is no way to directly root on kitkat or root without use pc.
simple step : Downgrade to .534 and install nuts dual recovery to get working root and recovery. Next, put the rom of your choice onto your sdcard and turn off your device. Turn on your device and hold volume down button to get into twrp. Rest of the step just follow the instructions.

no need to buy Z2

Custom n xposed