Problem with structure field in the panel after updating to V 2.2.2

Just updated from V 2.1.1 to 2.2.2
In the panel, console say:

Uncaught ReferenceError: Handlebars is not defined — js:281

and on line 281 of this js?v2.2.2 file:
this.template = Handlebars.compile(this.element.find('.structure-entries-template').html());

Here is the blueprint for the structure field:

    label: Interviewé(s)
    type: structure
    entry: >
      {{person}} — {{function}} — <i>{{personimg}}</i>
        label: Interviewé(e)
        type:  text
        placeholder:Prénom Nom
        width: 1/3
        label: Fonction/titre
        type:  text
        placeholder: Fondateur de
        width: 1/3
        label: Photo interviewé(e)
        type: select
        options: images
        width: 1/3

Any guess ??

Hum… post to quick and then found the issue by myself:
It was a problem with an old version of the structure field wich was sitting in the site/field/ directory and therefor blocking the new 2.2.2 version of the field.:sweat_smile: