My wifi is on and connected but on chromium it seems to not be working
Please try this:
Exit Piper to the desktop
open a terminal window
enter: ping 18.104.22.168 -c 3
do you get packets both sent and received?
is there any possible way to connect google home mini to piper computer?
You might want to try asking Google about this. Try using 'Connecting Raspberry Pi to Google Home ’