Transform [sender=unknown_publisher] For frame [steer_bot/laser_link]: Frame [steer_bot/laser_link] does not exist

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Hello, I've downloaded steer_bot (https://github.com/srmainwaring/steer...), and been trying to add laser gazebo plugin, but I'm facing this error, it's only fixed when I switch the fixed link from odom to laser_link but that's not what I want, I tried solutions suggested in similar previously asked questions but still can't get it to work. I'm using ubuntu 18.04 and ros melodic. A picture of the tf tree: https://drive.google.com/drive/folder...

I apologize if I'm missing any info, I'm still new to ros, so please let me know if I need to provide anything else.