Minecraft PE sign into Xbox Live button stuck saying signing in.

Whenever I click the sign in button on Minecraft PE it tranforms to the sentence "Signing into Xbox Live..." and it stays like that forever. I have been searching ways to fix this but no luck and I have been up all day trying to solve this. Please help.

 

Hurry up and please solve this or else Minecraft is a big waste of money and time because you can no longer create worlds and use other features without being forced to sign in.