How do I resolve 'Cannot connect to iCloud account' popup on macOS Sequoia?

Mr. Bobblesquat wrote:

I have a popup window that says -Cannot connect to the account iCloud. Please enter the password for the user "". - macOS Sequoia 15.4.1 This does not happen on my iPhone.

https://discussions.apple.com/content/attachment/7133d10d-b35c-4601-8372-ff922f18e2eb

[Re-Titled by Moderator]

what is the context here...? what triggers this "pop-up." ?

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Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support

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*Check your Apple ID device list to see where you're signed in

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كيف استرجع حسابي

I have this same issue with the blue background and the white @ sign. error messsage says, cant connect to account for icloud

Mu eid