I've upgraded my software to Android Version 12. One UI version 4.1 but the problem after the installation of the software STORE where I download apps had disappeared it has an APK thing ofwhich I don't understand. And now I can't upgrade many apps like banking apps/whatsapp or just everything
I would like to be assisted ASAP
'APKs' are installation files. They are the files responsible for installing things like apps. You didn't delete any of theese did you? If you can't update any of your apps I suggest restarting your device. If that doesn't work then delete the apps and reinstall them. As long as you didn't delete the APKs. I assure you updating your phones software wouldn't cause this.