Failed to login

Hello. I cannot login in 'Minecraft for Windows 10'. It gives me an error called: 'Failed to login. We tried to sign you in to your Microsoft account, but something went wrong. "
Please, I would like you to help me solve this soon. I can't find a way to make it work.

In addition, I contacted to Microsoft directly and they told me that they don't find any incident, and they told me that I should contact Minecraft instead.
Thanks, greetings,
Iván.