iMessage stopped working on MacBook Pro

DraganP wrote:

Recently i change my apple password and everything worked fine until yesterday, when i got notification on my MBP that iMessage is being used by another device ( that device was my iPhone ). After that i couldn't sign into my iMessage. I can access to all my apple services except iMessage. And when i get to login page for iMessage, first i will get info message "an unknown error occurred', and attempt to sign in after that will stuck on infinite loader icon. Any thoughts? So to recap, everything worked as expected for year and a half so far. Latest macOS update installed. Any thoughts?

https://discussions.apple.com/content/attachment/3c010d60-cef4-422e-b08c-5d8278a158d0

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>System Preferences>AppleID