Launch File SSH No Existing Connection

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I'm attempting to use a launch file to run a node on a another machine. The node works if run directly from the remote machine or if I SSH in then run it, but I get an error when running through SSH in a launch file.

This it the error I get:

remote[192.168.1.27]: failed to launch on TX2-004-ARM:

Unable to establish ssh connection to [192.168.1.27:22]: No existing session


[192.168.1.27-0] killing on exit
unable to start remote roslaunch child: 192.168.1.27-0
The traceback for the exceptions was written to the log file

This is my launch file:

<launch>
    <group>
        <machine name="TX2-004-ARM" username="nvidia" address="192.168.1.27" default="true" env-loader="/opt/ros/melodic/env.sh"/>
        <node name="serial_node" pkg=""serialros" type="serial_cmd" machine="TX2-004-ARM">
    </group>
</launch>

The log file hasn't been of much help and I have have no idea why SSH fails here but not normally.

Any ideas on why ROS fails SSH here?