Problems connecting to Xbox Live?

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2

Following problem:

My Xbox One is connected to the internet and never had any problems. For some days I can't play any games online anymore because then I get the message "You do not have access to Xbox Live. You can't use network services until you sign up." appears. My friends on Xbox Live are displayed to me quite normal and other applications such as Netflix run without problems.

Me

What do you think about signing up?

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