Bad Gateway after stage push

I deleted my site and rebuilt from scratch today to test the overall process. Here is what I did:

1) created site
2) logged on prod site, deleted anti spam plugin
3) created staging
4) logged on to staging and installed MarketPress and configured store pages
5) pushed stage to prod
6) tried to open prod and got "Error 502 - Bad gateway"

https://cp.wpmudev.host/

Best regards,
Brandon