Minecraft wont load

Hi, my child has been unable to log into minecraft for over the past week. When logging in it shows the red mojang screen, turns black for about 5-15 seconds and then kicks us back to the app display/ homescreen. We have tried pretty much everything from wiping the tablet to doing a full factory default reset. No improvement. I have seen others report about this issue saying it has been resolved, but we have seen no difference in logging in. Please advise.