How to have calendar popup in a form field of 'date' type? Using Drupal Console, I created a custom content entity in which there is a 'date' field:

$fields['subscription_date'] = BaseFieldDefinition::create('datetime')  
  -&gt;setLabel(t('Date souscription'))  
  -&gt;setSetting('datetime_type', 'date')  
  -&gt;setDefaultValue(array(0 =&gt; array(  
    'default_date_type' =&gt; 'now',  
    'default_date' =&gt; 'now',  
  )))  


The edit-form works as supposed and, particularly, editing 'subscription_date' brings up the calendar popup:

In my custom module, I defined a table form to 'mass' edit this entity:
I defined the date field in the form this way:  

$form['souscriptions'][$key]['date'] = array(  
    '#type' =&gt; 'date',  
    '#default_value' =&gt; $default_value,  
);  


In Firefox, it looks like:

and editing a date field doesn't show the date popup :-(
While in Chrome, it's OK:

Any idea why?
What should I add to my form to have at least the simple calendar popup I have in my content entity edit-form?  

Forgot to say: i'm using Drupal 8.4.2
This issue is coming because of jQuery confliction. 
Either you can update jQuery version or find out the confliction of jquery object.