Broken link between premiere and media encoder

Downloaded the most recent beta versions of Premiere and Media Encoder. I'm encountering a bug that is preventing me from sending files from Premiere to Media Encoder to have Media Encoder render them. Every time I try to start the queue in media encoder, it fails immediately and tells me "could not read from the source. Please check if it has moved or been deleted."

I can render the files directly in Premiere with no issues.