I too get a very similar error:
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DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Common.Globals.formatVersion(Version version, String fieldformat, Int32 fieldCount, String delimiterCharacter) at DotNetNuke.Services.Upgrade.Upgrade.UpgradeIndicator(Version Version, String PackageType, String PackageName, String Culture, Boolean IsLocal, Boolean IsSecureConnection) at DotNetNuke.Services.Upgrade.Upgrade.UpgradeIndicator(Version Version, Boolean IsLocal, Boolean IsSecureConnection) at DotNetNuke.UI.ControlPanels.IconBar.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---
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I get this on one of my portals only (of 2) when logged in as host.
If I try running the install again - I also get a blank - maybe it's because you can only run it once?
First time I ran the upgrade - i didn't have Network Service or ASP NET selected to have full permsion - but rectified this after getting the error below:
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Access to the path '\Install\Cleanup\03.00.08.txt' is denied.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.UnauthorizedAccessException: Access to the path 'E:\dnn2\Install\Cleanup\03.00.08.txt' is denied.
ASP.NET is not authorized to access the requested resource. Consider granting access rights...
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Another thing i noticed was that all the icons which should appear when rolling over admin and host (e.g. host settings, portal, site settings, pages etc..) do not appear.
My Host settings in the faulty portal also says "Error: Host Settings is currently unavailable."
I've upgraded from 4.9 to 5.1
SQL 2000
ASP NET Framework 2.0