@Frisco
I don’t see this issue when I use a fresh Third Person template and create a dedicated server from the command line in the way that you have.
/Script/SmoothSyncPlugin doesn’t look familiar. Did you move the plugin outside of the plugins folder it goes into when you download from the Marketplace? I’m not sure on the rules on moving plugins outside of that folder as other plugins seemed to break for me in the past from me doing this too. Try redownloading SmoothSync from the Marketplace but keep it where it downloads it to.
If you want to move it into your project or something, try copying over just the SmoothSync.h/cpp and State.h/cpp files. You may want to make these files first inside of your project then just copy over the content. Then change the SMOOTHSYNCPLUGIN_API near the top of the header files (.h) to whatever your project name is (just the SMOOTHSYNCPLUGIN part is your project name, then put the _API at the end of it). Make sure to keep the ALL CAPS for your project name even if it’s not in all caps when you made the project name.
Let me know how it goes.