icloud – Signing into iMessages on BigSur 11.3.1 (MacBook Air M1, 2020)

When I try to sign in into IMessages with my AppleID that I use on my IPhone, in Messages/Preferences/IMessage I never get to see the line:

“Enable Messages” in ICloud, and option to “Sync Now”,

as in the left side of the attached photo. Instead, I get this rotating circle right in front of the “Sign out” button just like the sign in never ended/succeeded (the right side of the photo).

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