DocGen API Returning an Internal Server Error for 2 Specific Docs

Error Specifics: 

ServiceApiException [message =Internal server error; transactionId=ZaMHYIVTW2F79ZwwCV8jDwrDq1JeyDej, requestId = qZD8NvQf6m9MEmAyXUL1VsbebafBpi07, httpStatusCode = 500, errorCode = INTERNAL_SERVER_ERROR]

ServiceApiException [message =Internal server error; transactionId=9MjoYY4wDNJyuDGPkfC2npD4Q2dlaDUV, requestId = jpwCIllZ1LWHOjl0CGsg9tkM7dhtJ0gp, httpStatusCode = 500, errorCode = INTERNAL_SERVER_ERROR]

When using the .NET PDFServices SDK, I'm receiving the above errors when I attempt to generate PDFs from 2 of my documents. I have a list of 8 similar documents and only those 2 of the 8 are erroring. The JSON data being sent is the same for all 8 of the documents, so I don't think the error is there. I don't see anything in the documents themselves that might cause errors either.