Twilio Conversation Fatal error when trying to send message?

I am trying to do a group conversation following the twilio samples online. I have the conversation and the people are connected (I think) but when I go send a message I get the following error:

Fatal error: Uncaught Twilio\Exceptions\RestException: [HTTP 412] Unable to create record: Group MMS activation failed in

Does anyone have any working samples of a working conversation in PHP? If you want I can post my full code (minus the keys and phone numbers)

Code to set up conversation:

$conversation = $twilio->conversations->v1->conversations
                                          ->create([
                                                       "friendlyName" => "RawesomePaws"
                                                   ]
                                          );

I then added the Twilio phone and 3 other SMS phone #'s

$participant = $twilio->conversations->v1->conversations("CHb61ad48141884350896047adc23XXXX")
                                         ->participants
                                         ->create([
                                                      "identity" => "Rawesome Orders",
                                                      "messagingBindingProjectedAddress" => "+1408840XXXX"
                                                  ]
                                         );

$participant = $twilio->conversations->v1->conversations("CHb61ad48141884350896047adc237XXXX")
                                         ->participants
                                         ->create([
                                                      "messagingBindingAddress" => "+1408409XXXX"
                                                  ]
                                         );

$participant = $twilio->conversations->v1->conversations("CHb61ad48141884350896047adc237XXXX")
                                         ->participants
                                         ->create([
                                                      "messagingBindingAddress" => "+1815210XXXX"
                                                  ]
                                         );

$participant = $twilio->conversations->v1->conversations("CHb61ad48141884350896047adc237XXXX")
                                         ->participants
                                         ->create([
                                                      "messagingBindingAddress" => "+1408540XXXX"
                                                  ]
                                         );

Now that the conversation is set up, I try to send a group message:

$message = $twilio->conversations->v1->conversations("CHb61ad48141884350896047adc237XXXX")
                                     ->messages
                                     ->create([
                                                  "body" => 'Message Body',
                                                  "author" => 'Rawesome Orders',
                                             ]
                                     );

and here is the output when I am in the terminal:

Fatal error: Uncaught Twilio\Exceptions\RestException: [HTTP 412] Unable to create record: Group MMS activation failed in /home/customer/www/sirota-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Version.php:88
Stack trace:
#0 /home/customer/www/XXX-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Version.php(223): Twilio\Version->exception(Object(Twilio\Http\Response), 'Unable to creat...')
#1 /home/customer/www/XXX-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Rest/Conversations/V1/Conversation/MessageList.php(57): Twilio\Version->create('POST', '/Conversations/...', Array, Array, Array)
#2 /home/customer/www/XXX-consulting.com/public_html/PPLG/sms_SendMessage.php(15): Twilio\Rest\Conversations\V1\Conversation\MessageList->create(Object(Twilio\Values))
#3 {main}
  thrown in /home/customer/www/XXX-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Version.php on line 88

Update 2 This is the complete log from phpLog

[24-Apr-2021 01:11:59 UTC] -- BEGIN Twilio API Request --
[24-Apr-2021 01:11:59 UTC] Request Method: POST
[24-Apr-2021 01:11:59 UTC] Request URL: /v1/Conversations/CHb61ad48141884350896047adc237cf45/Messages
[24-Apr-2021 01:11:59 UTC] Request Headers: 
[24-Apr-2021 01:11:59 UTC] User-Agent: twilio-php/6.16.0 (PHP 7.3.27)
[24-Apr-2021 01:11:59 UTC] Accept-Charset: utf-8
[24-Apr-2021 01:11:59 UTC] Content-Type: application/x-www-form-urlencoded
[24-Apr-2021 01:11:59 UTC] Accept: application/json
[24-Apr-2021 01:11:59 UTC] -- END Twilio API Request --
[24-Apr-2021 01:12:00 UTC] Status Code: 412
[24-Apr-2021 01:12:00 UTC] Response Headers:
[24-Apr-2021 01:12:00 UTC] Date:  Sat, 24 Apr 2021 01:12:00 GMT
[24-Apr-2021 01:12:00 UTC] Content-Type:  application/json; charset=utf-8
[24-Apr-2021 01:12:00 UTC] Content-Length:  129
[24-Apr-2021 01:12:00 UTC] Connection:  keep-alive
[24-Apr-2021 01:12:00 UTC] Twilio-Request-Id:  RQbd66fd8e4b548596a430a2646a4376f2
[24-Apr-2021 01:12:00 UTC] Twilio-Request-Duration:  0.195
[24-Apr-2021 01:12:00 UTC] Access-Control-Allow-Origin:  *
[24-Apr-2021 01:12:00 UTC] Access-Control-Allow-Headers:  Accept, Authorization, Content-Type, If-Match, If-Modified-Since, If-None-Match, If-Unmodified-Since
[24-Apr-2021 01:12:00 UTC] Access-Control-Allow-Methods:  GET, POST, DELETE, OPTIONS
[24-Apr-2021 01:12:00 UTC] Access-Control-Expose-Headers:  ETag
[24-Apr-2021 01:12:00 UTC] Access-Control-Allow-Credentials:  true
[24-Apr-2021 01:12:00 UTC] X-Powered-By:  AT-5000
[24-Apr-2021 01:12:00 UTC] X-Shenanigans:  none
[24-Apr-2021 01:12:00 UTC] X-Home-Region:  us1
[24-Apr-2021 01:12:00 UTC] X-API-Domain:  conversations.twilio.com
[24-Apr-2021 01:12:00 UTC] Strict-Transport-Security:  max-age=31536000
[24-Apr-2021 01:12:00 UTC] PHP Fatal error:  Uncaught Twilio\Exceptions\RestException: [HTTP 412] Unable to create record: Group MMS activation failed in /home/customer/www/XXX-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Version.php:88
Stack trace:
#0 /home/customer/www/XXX-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Version.php(223): Twilio\Version->exception(Object(Twilio\Http\Response), 'Unable to creat...')
#1 /home/customer/www/XXX-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Rest/Conversations/V1/Conversation/MessageList.php(57): Twilio\Version->create('POST', '/Conversations/...', Array, Array, Array)
#2 /home/customer/www/XXX-consulting.com/public_html/PPLG/sms_SendMessage.php(15): Twilio\Rest\Conversations\V1\Conversation\MessageList->create(Object(Twilio\Values))
#3 {main}
  thrown in /home/customer/www/XXX-consulting.com/public_html/PPLG/cron/twilio-php-main/src/Twilio/Version.php on line 88

Solution

I think the error codes for this are yet to be published, which I will follow up on internally. I have found some documentation for this error though.

Typical reasons for failure include:

Less than 3 non-chat participants in the conversation

There’s a chat participant in the conversation

There’s an existing group conversation with the exact same participants

There’s a participant with a ProjectedAddress only

Note that a participant with an Identity and a ProjectedAddress counts as a non-chat participant.

As far as I can see from your code, you have 4 non-chat participants (notably, the limit for group MMS is 4 participants right now), so that is fine. You have one participant with a ProjectedAddress and an Identity, which is fine. There are no participants with only a ProjectedAddress.

That leaves one potential issue, that there is already an existing group with these exact participants.

In order to check what's going on, I would now do a couple of things.

First, double check that these participants were correctly created and none are missing a property, particularly the participant with the Identity and ProjectedAddress.

Then, check to see if you have an existing conversation object that also has these participants.