How to set "Only when" condition for Multidropdown is empty

[nakano_satoko]

I’d like to set state, When Multidropdown is emputy.
but It shows error.

[justin.guy]

Have you tried this?

[oliviercoolen]

Hi @nakano_satoko
Multidropdown name's value:first item is empty

[nakano_satoko]

Thank you! @oliviercoolen