Bad Gateway 502 response on workbench login after upgrade to 7.x

I was able to successfully upgrade my OMV 6.x to 7.x and I can remote in using ssh, but I can no longer log into the Workbench web GUI. When I enter my username (admin) and password, I get a 502 error. I've reset the Workbench Admin password using omv-firstaid, but it still doesn't work. Any assistance would be greatly appreciated!

- Stealth Dave

That script reported an issue with my apt sources. Once I fixed that and reran the script, logins worked as expected! Thanks for your help!

- Stealth Dave