I can connect to Wi-Fi when I use RPi 3B but when I boot the system with 3B+ it doesn't connect to Wi-Fi automatically and when I click on the top right to connect it to Wi-Fi, I see the error:
no wireless interfaces found.
sudo rpi-update sudo apt-get update sudo apt-get upgrade
and some other common solutions on the internet but none of them solved the problem. I can connect to internet via Ethernet but I need to connect to Wi-Fi. I also tried to set the country code but it did not work.
Are there any other solutions we can try?