Attaching a physical button to the ROCK64

[momoster69]

Hi All,

I have downloaded the package that allows Python and GPIO interaction: https://github.com/mrfixit2001/Rock64-R64.GPIO

I have a button wired to the Ground pin and the pin 18 (https://www.cnx-software.com/wp-content/uploads/2017/08/Rock64-Pi-2-Bus-Pinout.png)
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so it looks like I am getting errors with my [url=https://pastebin.com/QpP1wgKH]script (https://pastebin.com/QpP1wgKH).
errors appear after I ctrl-c in terminal, the two errors are:
Error: Unable to get GPIO value
You must setup() the GPIO channel (BCM 18) first

does anyone know what I am doing wrong?