Type multiselect error

I want to create a field, type multiselect with subpages of page “team” as options.
Can I do this:

  label: Ansprechpartner
  type: multiselect
  options: query
  query: site.find('team').children

I get the message: this.state.findIndex is not a function

It works fine as type: radio

Thank you …

Which version do you use? I can’t reproduce on 3.3.1.

Sorry, after the update to 3.3.1 it works.