System.MissingMethodException: No parameterless constructor defined for this object.

Good day.

I am having a strange issue that I cannot figure out.

I am getting the following exception on my background jobs that I am running:
`System.MissingMethodException: No parameterless constructor defined for this object.`

However the jobs still work. In my case the job is to send a SMS. My phone gets the sms. however the hang-fore dashboard sits and retry the jobs.

Below is my code:

```
///
/// Send sms to multiple numbers as a background task using hangfire
///
///
///
public static void SendSmsBackground(List numbers, string content, int? sensorAlertHistoryId = null)
{
foreach (var number in numbers)
{
BackgroundJob.Enqueue(() => SendSmsViaAPi(number, content, sensorAlertHistoryId).Wait());
}
}
```
all my parameters are simple type variables.

What could be causing this issue?

Start with the BackgroundJob.Enqueue call in the reported SendSmsBackground method and trace how its expression is serialized and later executed. Compare the exception timing with the SMS method and the dashboard retry state; done requires a reproducible cause and a verified correction or clear documentation of the required job-construction behavior.

Written by the indexing model from the issue text.