Get PcConfigurationParams

I get a 500 error when attempting to execute Erp.BO.ConfigurationRuntimeSvc/PcConfigurationParams.

My code (via Postman) is about as simple and straightforward as it gets. I get the same error in Swagger. I get the same result if I attempt to add filters, like RelatedToTable eq ‘OrderDtl’.

Pretty sure I’m just fundamentally misunderstanding something. Am I missing something obvious about how I’m supposed to do this?

var client = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Get, "https://server/api/v2/odata/company/Erp.BO.ConfigurationRuntimeSvc/PcConfigurationParams");
request.Headers.Add("currentCompany", "company");
request.Headers.Add("X-API-Key", "abc");
request.Headers.Add("Authorization", "123");
var content = new StringContent("", null, "text/plain");
request.Content = content;
var response = await client.SendAsync(request);
response.EnsureSuccessStatusCode();
Console.WriteLine(await response.Content.ReadAsStringAsync());