Server provides misleading error code

[MicahSchiewe]

Steps to reproduce:

• Perform an operation in a call to the /matcher endpoint which causes an exception to be thrown (example: attempt to perform a Google search without a valid API key).

Expected result:

• The program tells me that the server encountered an error

Actual result:

• The program gives me a 204 response code, implying the query was successful but did not produce a response

This is based off of my understanding of how HTTP response codes should be used, so if I'm incorrect somewhere, please let me know.