Creating an OnlineMeeting for an organizer without TollFree Numbers causes Kiota deserialization error

[jamesgraham]

Describe the bug

I am creating Online Meetings for users. For some users, this works fine. For others it does not.

Basic details are passed to create the meeting, and I need the OnlineMeeting body back to pull data.

It appears that when hydrating the models, the serialiser blows up at AudioConferencing. You will see this in the stack trace.

Expected behavior

It creates the meeting and returns the response

How to reproduce

Create a meeting with a user that has no Audio Conferencing Policy attached

SDK Version

2.49

Latest version known to work for scenario above?

No response

Known Workarounds

No response

Debug output

Click to expand log

```

{"error":"Collection of type=string contains value of type=null","extractedError":"Collection of type=string contains value of type=null","userId":"5a9c723f-e3a6-43fb-92b2-104d65409585","exception":"UnexpectedValueException","file":"/home/jiminny/vendor/microsoft/kiota-abstractions/src/Types/TypeUtils.php","line":33,"trace":"#0 /home/jiminny/vendor/microsoft/microsoft-graph/src/Generated/Models/AudioConferencing.php(97): Microsoft\Kiota\Abstractions\Types\TypeUtils::validateCollectionValues(Array, 'string')
#1 /home/jiminny/vendor/microsoft/kiota-serialization-json/src/JsonParseNode.php(147): Microsoft\Graph\Generated\Models\AudioConferencing->Microsoft\Graph\Generated\Models\{closure}(Object(Microsoft\Kiota\Serialization\Json\JsonParseNode))
#2 /home/jiminny/vendor/microsoft/kiota-serialization-json/src/JsonParseNode.php(120): Microsoft\Kiota\Serialization\Json\JsonParseNode->assignFieldValues(Object(Microsoft\Graph\Generated\Models\AudioConferencing))
#3 /home/jiminny/vendor/microsoft/microsoft-graph/src/Generated/Models/OnlineMeetingBase.php(276): Microsoft\Kiota\Serialization\Json\JsonParseNode->getObjectValue(Array)
#4 /home/jiminny/vendor/microsoft/kiota-serialization-json/src/JsonParseNode.php(147): Microsoft\Graph\Generated\Models\OnlineMeetingBase->Microsoft\Graph\Generated\Models\{closure}(Object(Microsoft\Kiota\Serialization\Json\JsonParseNode))
#5 /home/jiminny/vendor/microsoft/kiota-serialization-json/src/JsonParseNode.php(120): Microsoft\Kiota\Serialization\Json\JsonParseNode->assignFieldValues(Object(Microsoft\Graph\Generated\Models\OnlineMeeting))
#6 /home/jiminny/vendor/microsoft/kiota-http-guzzle/src/GuzzleRequestAdapter.php(170): Microsoft\Kiota\Serialization\Json\JsonParseNode->getObjectValue(Array)
#7 /home/jiminny/vendor/php-http/promise/src/FulfilledPromise.php(39): Microsoft\Kiota\Http\GuzzleRequestAdapter->Microsoft\Kiota\Http\{closure}(Object(GuzzleHttp\Psr7\Response))
#8 /home/jiminny/vendor/microsoft/kiota-http-guzzle/src/GuzzleRequestAdapter.php(145): Http\Promise\FulfilledPromise->then(Object(Closure))
#9 /home/jiminny/vendor/microsoft/microsoft-graph/src/Generated/Users/Item/OnlineMeetings/CreateOrGet/CreateOrGetRequestBuilder.php(46): Microsoft\Kiota\Http\GuzzleRequestAdapter->sendAsync(Object(Microsoft\Kiota\Abstractions\RequestInformation), Array, Array)

</details>


### Configuration

_No response_

### Other information

_No response_

[jamesgraham]

This code is responsible:

'tollFreeNumbers' => function (ParseNode $n) {
    $val = $n->getCollectionOfPrimitiveValues();
    if (is_array($val)) {
        TypeUtils::validateCollectionValues($val, 'string');
    }
    /** @var array<string>|null $val */
    $this->setTollFreeNumbers($val);
},

$val is an array with a null value:

array(1) {
  [0]=>
  NULL
}