OK, the IP address of your computer is 172.168.0.100
I assume you have a router which connects your home network to the internet, right?
If you have a router, then it is this router which is using an IP address range for the home network, which is not really suitable.
Log into your router’s preferences menu and tell to use either
192.168.0.x
or maybe
172.19.0.x
as the address range for your home network.
After changing that setting, you need to reboot
the router first,
then after a few minutes the plex server
then all other devices on the network.
Changing the IP addresses of your home network to a ‘private’ range is important, because otherwise Plex won’t behave as expected and you’ll have to constantly jump through hoops to make it work.
