Error Code GHAST

I Have Updated My Minecraft Pocket Edition To Caves And Cliffs And Then I Try To Resign To My Microsoft Account But The Error Code GHAST Has Appeared. And I Tryed Everything I Can But NOTHING Works... 

And I Am Using A Lenovo Tablet And The Deny Access To Storage Then Allow Is Not Possible And Thats The Best Fix. 

I Want To Play With My Brother And Friends But I Cant. Please Help Me. Thank You.

FlameBlocks