Blocks on setting output (or doing anything but Arduino.new())

[Timfa2112]

Windows 10 x64 (x32 ruby)
Arduino Uno

When loading the example script, the program blocks when trying to execute board.output(13)
(Because I'm on Windows, I had to change the connecting to board = Arduino.new("COM1"))

Also when just trying to read pins (not output to them) board.getState(12) and board.analogRead(12) seem to block as well.
Tried to discover the cause, but I hadn't a clue what was going on (relatively new to Ruby myself)

Code used is purely the example code provided on the github page. (save for editing the port to "COM1")