Craft Pro 3.0.7
Notifications Plugin 1.0.6
In trying to send notifications for new entries that have a checkbox field, we get this error in the logs:
2018-05-14 09:19:32 [192.168.10.1][-][error][UnexpectedValueException] UnexpectedValueException: Error at offset 0 of 2 bytes in /home/path/to/vendor/yiisoft/yii2-queue/src/serializers/PhpSerializer.php:32
This manifests as the notification getting stuck in queue, never releasing, always showing progress bar.
Removing only the checkbox field from this section, the notifications work as expected without any errors.
From what I read, serialization errors may result from encoding problems.
What else can I try to resolve this? Where else can I look?