networking - Unable to detect wifi networks in ubuntu 16.04 Realtek Semiconductor RTL8723DE device issue, their is a check mark on Enable wifi but no wifi networks

I am facing problem in detecting wifi networks, I have already gone through all the steps explained in Realtek Semiconductor RTL8723de device d723 issue. It helped and their is a check mark on enable wifi at the top right corner, but the laptop is unable to detect any network.

Kindly Help I will be greatful to you.

In your paste, we see:

rtl8723de 0000:03:00.0: Direct firmware load for
rtlwifi/rtl8723defw.bin failed with error -2

Let's install the needed firmware and reboot. From the terminal:

cd /lib/firmware/rtlwifi
sudo wget --no-check-certificate https://github.com/lwfinger/rtlwifi_new/raw/extended/firmware/rtlwifi/rtl8723defw.bin

Reboot and tell us if the wireless is working.