The Google Play Services was auto-updated to version 8.4.88. So, because of this updation you are getting the issue "Unable to Backup & sync Photos" and "Blank Account Bug". There are few things to fix this issue. First, you need to clear Google Photos data and cache. Second, backup & sync photos to Google Photos. In order to backup & sync photos to Google Photos, open "Google Photos" app and tap "Menu" icon. Tap "Settings" and tap "Accounts and Sync" and then enable the Google Account. Now, go to the "Google Account sync settings" and enable the Google Photos and Google Photos Backup options. Third, enable the "Backup & sync" feature in Google Photos. Once you have done these three steps, Google Photos will auto backup and sync your photos to the cloud.
Quick Tip to Keep your Photos Safe
Making backups of your photos & videos is a chore you probably skip, but it really doesn't have to be hard. Here's an effortless way to backup photos - PicBackMan. PicBackMan is the easiest and simplest way to keep your photos safely backed up in one or more online accounts. Simply download PicBackMan (it's free!), register your account, connect to your online store and tell PicBackMan where your photos are - PicBackMan does the rest, automatically. It bulk uploads all photos and keeps looking for new ones and uploads those too. You don't have to ever touch it.
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