
This is an issue that we came across ourselves when we upgraded to Marshmallow and had to reinstall the software to fix the problem. There is a long thread of others on the official Sony Mobile Talk forums who have had a similar issue. Sony’s advice can be seen below on how to resolve the problem, but the number of complaints has led Sony Canada to pull the update until it can provide a fix. If you had the issue let us know below, including how you resolved it.
Xperia Z5/Xperia Z5P owners: we’ve removed the Android 6.0 update at this time & will advise once it’s been re-issued. Thx for ur patience.
— Sony Xperia CA (@SonyXperiaCA) March 26, 2016
Sony’s official advice on how to resolve the Marshmallow Google Play Store issue
1. Clear the data of the Play Store. To do this on your Z5:
Go to Settings > Apps > > Show system > Google Play Store > Storage > Clear Data.2. Disable location services. To do this on your Z5:
Go to Settings > Location > Move the slider to the Off position.3. Reinstall the Android system.
To do this on an Xperia device, please follow the steps here.