minecraft pocket edtion error code cauldron

i am unable to sign in to my microsoft account on minecraft pocket edition on my iphone. the error code is cauldron. i have tried reinstalling the app and using another microsoft account. it takes a long time to sign into my microsoft account and then it tells me it failed to login. i have been waiting for hours. i even decided to get out of the app and wait for a few hours before going back in. nothing works