I can't connect to my minecraft serrver

when i connect to my network i go tot he zerotier centeral site i copy my vpn ip then i paste it in the server ip setting in server.properties then i try to join with my windows pc on my home network on the same network id from the vpn it dosen’t want to connect i have version 1.6.4
im testing this on my home network so that if it works i share this vpn with my friend to play together also im using linux mint 20.1 xfce. please help