Data-Shapes Multi Input UI - Unhandled Exception has occurred

Hi All,

I am currently trying to utilize the Data-Shapes package to improve a scrips UI. I have followed the guide on the data-shapes website, however, once trying to run it i come across this error shown below. The script worked before, i changed the UI. So its got to be something I’ve done wrong with the multi input portion.

If anyone could help that would be great,

Thanks, Harry