Discussion - SLAM on our robot with slam_toolbox (Making a Mobile Robot Pt 15)

I have been following this tutorial as the reference for building my simulated AGV which is a Rover bot , currently I am stuck at the SLAM part where the error is coming from Rviz due to some TF issue. I am using slam_toolbox but as soon as i considered map or odom as fixed frame the dynamic joints of robot white out showing the error “no transform available” due to which the dynamic links stops and while controlling robot in gazebo only static links moves , how should i fix these please help??
I am using ROS2 humble Gazebo ignition . Please do ask for any other informational requirement if needed