Error while trying to login with my Xbox account in Minecraft PE

Hello,

It has been over a month since I'm having this issue. I have tried with multiple accounts and I'm still getting the same error over and over again when I try to connect game servers to play in form of multiplayer.

I'm a server owner and I need to test a bug with Pocketmine, the MCPE server software when placing certain blocks, that is definetively related to the software end, however, when I tap on any servers since the last minecraft pocket update I'm unable to login; once I fill up my credentials and I click on the button, some seconds after I get the message that an error ocurred, please try again in Xbox.com.

Thanks for your time.
Kevin A.