CDaniells

As of a few days ago, I started to be logged out on both of my Amazon Fire tablets, after being logged in for months, maybe a year. At first I could log back in but as of yesterday I am now getting the error message of "unable to authenticate" (can login fine on web browser hence this entry), and am guided towards the app store to update, but there are no updates. Have tried all the fixed like restarting, uninstalling, reinstalling etc. But no luck. Anyone else having this issue or encountered this before?