Honestly, I don't blame you for not catching this it all lol. If you try to start the game in; Tutorial, Transport Belt madness, Tight Spot, Wave Defense, Supply challenge, team production, you get this error;

The mod Flow Control (3.2.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Flow Control::on_configuration_changed
Unknown interface: valves
stack traceback:
[C]: in function 'call'
Flow Control/control.lua:15: in function <Flow Control/control.lua:2>

Does not throw error in PvP, Sandbox, or Rocket Rush.

I know weird edge case, the important thing would be the tutorial, but im not sure how many people use tutorial on modded clients lol.

I'm on the expiremental branch, if that matters.