Unable to connect using Remmina and wireguard on linux mint

I want to connect to another machine(probably windows server) using wireguard . they have provided a RDP file to connect. I have installed wireguard and

wg show

gives me thw right parameters entered in the config file. so wireguard is good But in Remmina, on importing the rdp file and connecting, i am getting error

(DEBUG) - (rco_on_disconnect) - Disconnect signal received on RemminaProtocolWidget

this is from Remmina debug logs. Please help me solve this, what could be the issue and how to connect using rdp file from linux mint.