I can no longer log into realms by cell phone. The message says: "We were unable to connect to realms at this time. We will try again shortly."

I have Minecraft installed on the Xbox One S, since last year. It is also installed on my Samsung S8 phone.
I bought a Samsung E30 notebook and installed Minecraft (I bought a version for Windows 10), but since that moment I can no longer enter the realms by cell phone.
The message says: "We were unable to connect to realms at this time. We will try again shortly."
I've tried several alternatives, restarted my phone, uninstalled Minecraft and reinstalled it, checked if my Live Gold and Game Pass Ultimate accounts were in order.