Invalid Session/Playfab Error and Avatars NOT Loading

Upon booting the game,my Avatar will not load and the Marketplace option will be greyed out and display either "Invalid Session.Try Restarting Your Game" or a "MCPE-159452 Playfab Environment Mismatch" error message.I have tried uninstalling,restarting,uninstalling some more,updated the games app client,etc...But to no success.I do not have any mods installed.