MQDH Fails to upload to Rift Store

I have been trying for months to upload our PCVR game to the Rift/PCVR store. The MQDH keeps failing. There was a time when it worked but only by giving you an error claiming it didn't... then by chance it seemed to succeed in the background anyway. Now it's not working at all. I have been using MQDH to upload the Quest version just fine for years, so I know what I'm doing. But perhaps there's something undocumented that's different about the PCVR upload process? I have asked about this in numerous places and had no consistent working answer. I'd appreciate someone who knows what they're doing getting on a call with me to for 5 minutes to resolve this. Our launch has already happened on other platforms, and Meta's PCVR store is getting left behind due to this.