Wifi connected but no internet offen

Wifi connected but no internet offen

Wifi connected but no internet offen
Wifi connected but no internet offen
Yesterday
Model: Archer BE6500  
Hardware Version:
Firmware Version:

Recently bought the BE6500 model. It was fine for a day or so. Then I updated the latest firmware. I often lost internet but wifi is still connected. How do I fix the problem? I tried changing the channels and also smart control..none help. What do I do to fix it? Should I return the router and get something else?

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