WIFI problems on Ubuntu GNU/Linux

Error:

From 192.168.0.3 icmp_seq=25625 Destination Host Unreachable

To solve this edit the file /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf and change:

wifi.powersave = 3 

to

wifi.powersave = 2

And save!

References:
- https://askubuntu.com/questions/1296506/ubuntu-20-04-why-does-turning-off-wi-fi-can-be-turned-off-to-save-power-turn