You seem to be missing a colon there, though maybe that was just a typo:
Actually that was just a typo in the post above (the colon was there). Anyway I was able to resolve the issue by restarting the FileMaker Server Service in the Services MMC.
As an aside, I do believe the issue resulted when I attempted to open a DB that was closed due to corruption (hence trying to bring over the backup). The admin console showed it as "verifying" and it was stuck. After a restart of the service, it showed up as closed and I was able to upload my backup