Google messages stopped working?

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I have S9 phone with AT&T and a Tab S7 plus. Have been using Google messages for many months now to be able to text from the tablet. Today it stopped working and the app now says not available for your device for the tablet. Anyone run into this?
been trying to get google messages running on my s7 tab + (ATT branded / network unlocked)
and its nearly impossible for me.
 
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