Unable to sign in on Studio Pro 9.22 due to invalid class error

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I’m having trouble with Studio Pro 9.22. It is failing to sign in, and gives the below error: Microsoft.Management.Infrastructure.CimException: Invalid class at Microsoft.Management.Infrastructure.Internal.Operations.CimSyncEnumeratorBase`1.MoveNext() at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate) at Mendix.Modeler.Core.View.Windows.Environments.VirtualMachineDetector.IsRunningInParallels() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.Windows\Environments\VirtualMachineDetector.cs:line 23 at Mendix.Modeler.Core.View.Windows.Environments.VirtualMachineDetector.get_IsWindowsVm() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.Windows\Environments\VirtualMachineDetector.cs:line 13 at Mendix.Modeler.UserManagement.VirtualMachineSupport.<get_IsWindowsVmWithMacOsDefaultBrowser>b__4_0() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UserManagement\VirtualMachineSupport.cs:line 15 at Mendix.Modeler.Utility.Result.CatchExceptions[T](Func`1 action) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Utility\Result.cs:line 136   I’ve tried:   Restarting Mendix Restarting my computer (Windows 11 Pro) Reinstalling Mendix 9.22 (I did still have Studio Pro 9.18 installed) None of this has worked
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2 answers
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So, I got past the error, but I have no idea how to fix it in future.
My machine just happened to have a major windows update ready (I would have been on second latest version), and after updating windows, it now works. I assume it replaced some possibly corrupted DLL...

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Hi David,

 

The Windows update indeed seems to be the culprit here. It may already have hijacked something which Studio Pro needs to start.

Glad to hear it’s resolved now.

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