How do I troubleshoot a SOAP API error?

I'm getting a 500 Internal Server Error when calling my SOAP API. What should I do?

A 500 Internal Server Error usually indicates a problem on the server side. First, check the server logs for any error messages.

I checked the logs, and it says 'NullPointerException'. What does that mean?

A NullPointerException typically means that your code is trying to use an object reference that hasn't been initialized. Review your code for any variables that might be null.

I found a variable that was not initialized. How can I fix it?

You can initialize the variable before using it, or add a null check to ensure it has a value before accessing it.

Thanks! That helped a lot. Is there anything else I should check?

Make sure to also validate the input data being sent to the API, as incorrect data can also lead to server errors.