Odd issue with VPN

I’m creating a VPN IPSEC tunnel using this guide http://mikrotikroutersetup.blogspot.com/2014/02/mikrotik-router-ip-sec-site-to-site-vpn-tunnel-configuration.html

After I do the last step, the IP I set for the local network 192.168.1.1 is changing to 192.168.1.0 and then I can’t reconnect to the router after making me reset it every time.

Is there a reason it keeps setting itself to .0 and not allowing me to change it?