Custom Fields not showing

Hi, Really appreciate your plugin. I seem to be having an issue with nested elements. I have tried multiple syntax and RTFM before asking.
My json is:

[
   {
      "ID":87600,
      "the_name":"John Smith",
      "custom_fields":{
         "collab_phone":[
            "+1-352-608-6346"
         ],
         "collab_email":[
            "info@john.com"
         ]
      },
      "post_date":"2020-10-07 01:56:36"
   },
   {
      "ID":87405,
      "the_name":"Jane Doe",
      "custom_fields":{
         "collab_phone":[
            "+1-352-608-6346"
         ],
         "collab_email":[
            "info@jane.com"
         ]
      },
      "post_date":"2020-10-02 04:51:07"
   },
      {
      "ID":87405,
      "the_name":"Michael Moe",
      "custom_fields":{
         "collab_phone":[
            ""
         ],
         "collab_email":[
            "info@michael.com"
         ]
      },
      "post_date":"2020-10-02 04:51:07"
   },
]

My code is:

<table>
  <thead>
<tr>
   <th>Name</th>
   <th>Email</th>
   <th>Phone</th>
   <th>Date</th>
   <th>ID</th>
</tr>
</thead>
<tbody>
[jsoncontentimporter url="https://petscams.com/wp-json/rest-routes/v2/85130" basenode=custom_fields numberofdisplayeditems=3 ]
 <tr>
     <td>{the_name}</td>
     <td>{custom_fields.collab_phone:}</td>
     <td>{custom_fields.collab_email}</td>
     <td>{post_date}</td>
     <td>{ID}</td>
 </tr>
[/jsoncontentimporter]
</tbody>
</table>

I have of course tried multiple combinations for {custom_fields.collab_phone:} and {custom_fields.collab_email:} but everything except for phone and email appear.
Would very much appreciate some help.