Calendar with primefaces does not deploy

Hi, I would like to know if anyone knows why the primeface calendar does not open when I click on its field.

The image shows how the field stays when clicking on it.

the code of the page is the following:

<ui:define name="cuerpo">
    <h:form prependId="false">

        <p:panel id="datosPanel" header="Datos Usuario">
            <h:panelGrid columns="3">

                <h:outputText value="fecha" />

                <p:calendar pattern="dd/MM/yyyy" locale="pt"
                    value="#{fechaController.date}" />

            </h:panelGrid>
        </p:panel>

    </h:form>
</ui:define>

Thank you.