Problems to set a value into a custom attribute menu_type
We are facing a problem to set a value into a custom attribute menu. We tried another custom attribute (which wasn't menu type) and it work as well. Our problem is that we cannot set a menu field.
We tried to use some standard widgets, like: FormInput, TextInput, BasicCustomAllInput, BasicFormInput, SelectionInput and we failed (there was a error message when we tried to submit the form). The standard widget "BasicSelectionInput" let us choose a value to the custom attribute and submit the form, but this value did not appear in the report we made in console.
Could you help us with this trouble?