Unable to Sign ClickOnce Manifests

We are recieving the following error when attempting to sign a ClickOnce Manifest file.

```
System.AggregateException: One or more errors occurred. (Could not create hash algorithm object.)
---> System.ApplicationException: Could not create hash algorithm object.
---> System.Security.Cryptography.CryptographicException: Could not create hash algorithm object.
at System.Security.Cryptography.Xml.Reference.CalculateHashValue(XmlDocument document, CanonicalXmlNodeList refList)
at System.Security.Cryptography.Xml.SignedXml.BuildDigestedReferences()
at System.Security.Cryptography.Xml.SignedXml.ComputeSignature()
at System.Deployment.Internal.CodeSigning.SignedCmiManifest2.AuthenticodeSignLicenseDom(XmlDocument licenseDom, CmiManifestSigner2 signer, String timeStampUrl, Boolean useSha256) in \SignService\src\SignService\Utils\mansign2.cs:line 502
at System.Deployment.Internal.CodeSigning.SignedCmiManifest2.Sign(CmiManifestSigner2 signer, String timeStampUrl) in \SignService\src\SignService\Utils\mansign2.cs:line 135
at SignService.Utils.ManifestSigner.SignFile(String path, HashMode hashMode, RSA rsaPrivateKey, X509Certificate2 publicCertificate, String timestampUrl) in \SignService\src\SignService\Utils\ManifestSigner.cs:line 32
--- End of inner exception stack trace ---
at SignService.Utils.ManifestSigner.SignFile(String path, HashMode hashMode, RSA rsaPrivateKey, X509Certificate2 publicCertificate, String timestampUrl) in \SignService\src\SignService\Utils\ManifestSigner.cs:line 45
at SignService.SigningTools.MageSignService.RunSignTool(String args, String inputFile, HashMode hashMode, RSA rsaPrivateKey, X509Certificate2 publicCertificate, String timestampUrl) in \SignService\src\SignService\SigningTools\MageSignService.cs:line 284
at SignService.SigningTools.MageSignService.Sign(String args, String inputFile, HashMode hashMode, RSA rsaPrivateKey, X509Certificate2 publicCertificate, String timestampUrl) in \SignService\src\SignService\SigningTools\MageSignService.cs:line 221
at SignService.SigningTools.MageSignService.<>c__DisplayClass17_0.b__0(String file, ParallelLoopState state) in \SignService\src\SignService\SigningTools\MageSignService.cs:line 151
at System.Threading.Tasks.Parallel.<>c__DisplayClass33_0`2.b__1(Int32 i, ParallelLoopState state)
at System.Threading.Tasks.Parallel.<>c__DisplayClass19_0`1.b__1(RangeWorker& currentWorker, Int32 timeout, Boolean& replicationDelegateYieldedBeforeCompletion)
--- End of stack trace from previous location ---
at System.Threading.Tasks.Parallel.<>c__DisplayClass19_0`1.b__1(RangeWorker& currentWorker, Int32 timeout, Boolean& replicationDelegateYieldedBeforeCompletion)
at System.Threading.Tasks.TaskReplicator.Replica.Execute()
--- End of inner exception stack trace ---
at System.Threading.Tasks.TaskReplicator.Run[TState](ReplicatableUserAction`1 action, ParallelOptions options, Boolean stopOnFirstFailure)
at System.Threading.Tasks.Parallel.ForWorker[TLocal](Int32 fromInclusive, Int32 toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally)
--- End of stack trace from previous location ---
at System.Threading.Tasks.Parallel.ThrowSingleCancellationExceptionOrOtherException(ICollection exceptions, CancellationToken cancelToken, Exception otherException)
at System.Threading.Tasks.Parallel.ForWorker[TLocal](Int32 fromInclusive, Int32 toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally)
at System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](IList`1 list, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
at System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](IEnumerable`1 source, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
at System.Threading.Tasks.Parallel.ForEach[TSource](IEnumerable`1 source, ParallelOptions parallelOptions, Action`2 body)
at SignService.SigningTools.MageSignService.SubmitInternal(HashMode hashMode, String name, String description, String descriptionUrl, IList`1 files, String filter) in \SignService\src\SignService\SigningTools\MageSignService.cs:line 88
at SignService.SigningTools.MageSignService.<>c__DisplayClass10_0.b__0() in \SignService\src\SignService\SigningTools\MageSignService.cs:line 63
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location ---
at SignService.SigningTools.MageSignService.Submit(HashMode hashMode, String name, String description, String descriptionUrl, IList`1 files, String filter) in \SignService\src\SignService\SigningTools\MageSignService.cs:line 63
at SignService.SigningTools.SigningToolAggregate.Submit(HashMode hashMode, String name, String description, String descriptionUrl, IList`1 files, String filter) in \SignService\src\SignService\SigningTools\SigningToolAggregate.cs:line 191
at SignService.Controllers.SignController.SignFile(IFormFile source, IFormFile filelist, HashMode hashMode, String name, String description, String descriptionUrl) in \SignService\src\SignService\Controllers\SignController.cs:line 99
at lambda_method395(Closure , Object )
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Logged|12_1(ControllerActionInvoker invoker)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged|17_1(ResourceInvoker invoker)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged|17_1(ResourceInvoker invoker)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.Policy.AuthorizationMiddlewareResultHandler.HandleAsync(RequestDelegate next, HttpContext context, AuthorizationPolicy policy, PolicyAuthorizationResult authorizeResult)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
```

I haven't been able to pinpoint why it's doing this either.

Some basic information about the cert we're using is that it's a GlobalSign EV CodeSign Cert stored in a premium Key Vault (HSM storage), and that it has a SHA256 signature.

This works for all other files and file types, but once it comes down to performing the clickonce manifest it crashes.