I had the same issue, and still unresolved. Occurred after not using the device for a year and connecting today.
Applied the hotfix and now no longer see the connectivity error when updating. However, my Vero 4K+ does not actually update: the “Update Available” logo remains on home screen and the My OSMC page reports 2020.11-1.
Also, network connectivity is problematic. It hangs when accessing a directory that used to work.
The updates were successful. I clearly have network access because it was able to update. However, the system hangs when I try to access any of my folders. And even when I attempt to browse NFS.
Are your sure all packages have been upgraded? Did Kodi after the restart did a database migration (will be visible on screen for a couple of minutes).
Maybe try update again from MyOSMC and/or share some logs.