openvswitch based router and GRE tunnel "Issue Creating GRE Tunnel: "Address family not supported by protocol"

[Sagarved]

Hello,

I'm encountering an issue while trying to create a GRE tunnel on my Open vSwitch-based router. The error message I receive is: Issue Creating GRE Tunnel: "Address family not supported by protocol"
I have ovswitch based router, it has IP address of 192.168.0.248, on the same network there is Ubuntu with IP address of 192.168.0.151. Both devices are reachable through ping.
I have faced an error on openvswitch router when I try to run
"sudo ovs-vsctl add-port br0 gre-home -- set interface gre-home type=gre options:remote_ip=192.168.0.151"
I have changed br0 to br-wan.
ERROR: could not add network device gre-home to ofproto(address family not supported by protocol)

My openSync Version: 3.2.5.0

SCP|                                                                                                         Ubuntu
GRE| -------------------------------Router -----------------------GRE
[192.168.100.248] [192.168.100.151]

What should I do? My router kernel has support for GRE tunnel.