My problem solved in software 2.0.5 - access google account login , added account tab. I had to reset google services to factory settings, now everything works beautifully.
This problem also exists on Himedia Q30 android 7.
If you update google play services and log out of your google account (I do not want to stay logged in to google all the time)
1) the add google account is not working
2) you are not able to open google play store to input your login info and
3) you have to uninstall the google play services update. to get the above working again.
Unfortunately the latest version of You Tube apk requires google play services update and there is a constant nagging popup screen, it becomes unusable and have to use older version of the you tube apk.
Sure hope Himedia sort out this defect in the firmware.