Sponsor module is stack tracing when using invite links

HumHub now supports inviting new members by link.

After submitting the initial dialog that asks for the email address, the following stack-trace is written to the log file


2023-05-16 14:38:20 [172.18.0.1][-][-][error][application]
yii\base\ErrorException: Attempt to read property "id" on null in
/var/www/localhost/htdocs/protected/modules-custom/sponsor/Events.php:35
Stack trace:
#0
/var/www/localhost/htdocs/protected/modules-custom/sponsor/Events.php(35):
yii\base\ErrorHandler->handleError()
#1 [internal function]:
sij\humhub\modules\sponsor\Events::onAfterInsertInvite()
#2
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/base/Event.php(312):
call_user_func()
#3
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/base/Component.php(642):
yii\base\Event::trigger()
#4
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/db/BaseActiveRecord.php(998):
yii\base\Component->trigger()
#5
/var/www/localhost/htdocs/protected/humhub/components/ActiveRecord.php(83):
yii\db\BaseActiveRecord->afterSave()
#6
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/db/ActiveRecord.php(615):
humhub\components\ActiveRecord->afterSave()
#7
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/db/ActiveRecord.php(570):
yii\db\ActiveRecord->insertInternal()
#8
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/db/BaseActiveRecord.php(676):
yii\db\ActiveRecord->insert()
#9
/var/www/localhost/htdocs/protected/humhub/modules/user/controllers/RegistrationController.php(153):
yii\db\BaseActiveRecord->save()
#10 [internal function]:
humhub\modules\user\controllers\RegistrationController->actionByLink()
#11
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/base/InlineAction.php(57):
call_user_func_array()
#12
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/base/Controller.php(178):
yii\base\InlineAction->runWithParams()
#13
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/base/Module.php(552):
yii\base\Controller->runAction()
#14
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/web/Application.php(103):
yii\base\Module->runAction()
#15
/var/www/localhost/htdocs/protected/vendor/yiisoft/yii2/base/Application.php(384):
yii\web\Application->handleRequest()
#16 /var/www/localhost/htdocs/index.php(25):
yii\base\Application->run()
#17 {main}
    in
/var/www/localhost/htdocs/protected/modules-custom/sponsor/Events.php:40
    in
/var/www/localhost/htdocs/protected/humhub/components/ActiveRecord.php:83
2023-05-16 14:38:20 [172.18.0.1][-][-][info][application] $_GET = [
    'token' => '0H85_YMwczv0yj'
    'spaceId' => '23'
]

$_POST = [
    '_csrf' =>
'Q-n3uLGHC34YAT9ByLo9ujF2kMqgzqTbbnrdVQqFCvAFs7rpwr84NVVmcRKy30n8WhLIvuuPkL0jA6gtUMpZoQ=='
    'Invite' => [
        'email' => '[test.monkey.4@email.local](mailto:test.monkey.4@email.local)'
        'captcha' => 'namuoe'
    ]
]```

StevenJoynt / HumHub-Sponsor

Sponsor module is stack tracing when using invite links #3