New to Pine A64 : Troubleshooting

[Toeknee]

Hi, I was happy to received my 2 Pine last week.

I have 2 different problems with both of them right now.

Pine #1
PineA64+ 2GB
Wifi module working
Power on/off switch soldered in place and working
Booted with supplied Android SD card
Connected to HDMI TV

I entered my Google Account and I was able to download 2 apps.
But now every app I tried to download is giving an error message.
"Authentication is required. You need to sign into your Google Account." (See attached image)
I click on the message, but is not asking me to sign it.
The actual Google Play Store is showing my email address linked to the account so it seemed it is connected.

Is there a way out so I can download new apps?

Pine #2
PineA64+ 2GB
Wifi module working
Power on/off switch soldered in place and working
Bought this one with the LCD Touch Screen

I download the specific Android version to work with the LCD Touch Screen
The LCD Screen is showing the desktop but when I touch the screen nothing happens. (See attach image)

Anything I did wrong or I should correct?
I checked wiring and it seems fine.

Thank you!