Issue/bug with single and multiple selection widgets in v5.8.1

Hi all,

I’m currently setting up a component that populates a json table downstream in the workflow and I need to use single and multiple selection widgets in order to do this. I can configure these in the normal way but when I open the view (F10) I get the following error, which I am unable to close. As it stands, I’ve changed to string widgets but this won’t be able to be used in the eventual final version. Have I done something wrong or is this a bug?

Thanks,

Ian