Currently trying to upgrade our production environment from 2020.2.6 to 2022.3 but the installer appears to stick on the check validation page for hours, resulting in me having to cancel the installation.
The upgrade ran fine in our DEV setup, so not entirely sure what the issue is.
Attached are the screens that are displayed on running either the offline or online installer.


[View:/cfs-file/__key/communityserver-discussions-components-files/4/OrionInstaller.BootStrapper.log:640:480]
[View:/cfs-file/__key/communityserver-discussions-components-files/4/AdministrationService.Client.log:640:480]
I have also uploaded the logs from the OrionInstaller.boostrap log as well as the log for the AdministrationService.Client.log
I notice from near the end of the AdministrationService.Client.log file there is an entry that states
[16] ERROR (null) SolarWinds.Administration.Installer.ErrorHandler.HttpResponseAdapter - Unexpected error occured.
System.NullReferenceException: Object reference not set to an instance of an object.
This message appears to be what is displayed on the splash screen albeit not very clearly, but its not quite clear what this error is actually referring to?
Does anyone have any ideas?
@tony.johnson any ideas?