If you can’t upload directly you might have a few other options:
1 - Automatically download the update from the update server - firewall dependant allowing it through - there may be a flashing bee towards the top right of the HiveManager - I’m not sure if this goes back to the 6.X versions of HM however.
2- A bit of a longer workaround, but something I did with a customer recently:
Export your existing HiveManager config. Redeploy on a newer HiveManager version, change IPs around of the instances so no need to change DNS records etc, APs should come back online. HiveManager will have the AP firmware with it so no need to upload it separately. To copy licences across you will most likely need support to reinitialise them.
