PBIX Cannot Open

Hello all,

I have been working on a pbix file since last Wednesday and today at 10 am it failed to open. I was able to work on it earlier today but now I get this error. 

Error Details:

Feedback Type:
Frown (Error)

Timestamp:
2021-01-04T17:04:30.2247114Z

Local Time:
2021-01-04T11:04:30.2247114-06:00

Session ID:
194f874a-d1db-48ba-91ce-dee2fda68727

Release:
December 2020

Product Version:
2.88.802.0 (20.12) (x64)

Stack Trace:
at Microsoft.Mashup.Host.Document.OperationResult.ThrowIfFailed()
at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingMashupDocumentBuilder.<>c__DisplayClass18_0.<BuildQueries>b__2(PackageEditor packageEditor)
at Microsoft.Mashup.Host.Document.Model.Queries.<>c__DisplayClass163_0.<InvokeWithWritablePackageEditor>b__0(PackageEditor packageEditor)
at Microsoft.Mashup.Host.Document.Model.Queries.ChangeScope.Invoke[T](Func`2 action, Nullable`1 changeReason)
at Microsoft.Mashup.Host.Document.Model.Queries.InvokeWithPackageEditor[T](Nullable`1 changeReason, Func`2 action)
at Microsoft.Mashup.Host.Document.Model.Queries.InvokeWithWritablePackageEditor(ChangeReason changeReason, Action`1 action)
at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingMashupDocumentBuilder.BuildQueries()
at Microsoft.PowerBI.Client.Windows.Modeling.Hosting.ModelingMashupDocumentBuilder.BuildRestorationInput()
at Microsoft.PowerBI.Client.Windows.Modeling.Utilities.MashupQueryGenerator.GenerateRestorationInputFromModel(IDataModel dataModel, QueriesSettings queriesSettings)
at Microsoft.PowerBI.Client.Windows.Services.ReportFactory.CreateReportFromPowerBIPackage(IPowerBIPackage powerBIPackage, String pbixFilePath, Byte[] securityBindings, Boolean requiresConversionToReportLayout, PowerBIPackageOpenOptions options, IPowerBITelemetryService powerBITelemetryService, IAnalysisServicesService analysisServices, Version pbixFileVersion, PackageValidationResult& mashupValidationResult)
at Microsoft.PowerBI.Client.Windows.Services.PowerBIPackagingService.Open(Stream stream, String streamName, IPowerBIWindowService windowService, Nullable`1 entryPoint, PowerBIPackageOpenOptions options, ReportPreparerResult& prepareResult)
at Microsoft.PowerBI.Client.Windows.Services.FileManager.<LoadFromPbix>d__24.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.PowerBI.Client.Windows.Services.UIBlockingService.<>c__DisplayClass15_0`1.<<BlockUIAndRun>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.PowerBI.Client.Windows.Services.UIBlockingService.WaitOnUIThreadForTaskCompletion[T](Task`1 task)
at Microsoft.PowerBI.Client.Windows.Services.UIBlockingService.BlockUIAndRun[T](Func`1 asyncMethod)
at Microsoft.PowerBI.Client.Windows.Services.FileManager.OpenFile(IPowerBIWindowService windowService, IPbixFile fileToOpen, Nullable`1 entryPoint)
at Microsoft.PowerBI.Client.Program.TryOpenOrCreateReport(IUIHost uiHost, IPowerBIWindowService windowService, IFileManager fileManager, IFileHistoryManager fileHistoryManager, String filePath, FileType fileType)
at Microsoft.PowerBI.Client.Program.<>c__DisplayClass4_0.<Main>b__1()
at Microsoft.PowerBI.Client.Windows.IExceptionHandlerExtensions.<>c__DisplayClass3_0.<HandleExceptionsWithNestedTasks>b__0()
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)

PowerBINonFatalError:
{"AppName":"PBIDesktop","AppVersion":"2.88.802.0","ModuleName":"Microsoft.Mashup.Document.dll","Component":"Microsoft.Mashup.Host.Document.OperationResult","Error":"System.InvalidOperationException","MethodDef":"ThrowIfFailed","ErrorOffset":"34"}

OS Version:
Microsoft Windows NT 10.0.18363.0 (x64 en-US)

CLR Version:
4.7 or later [Release Number = 528040]

Peak Virtual Memory:
37.8 GB

Private Memory:
290 MB

Peak Working Set:
419 MB

IE Version:
11.1198.18362.0

User ID:
c88ec219-8650-4a4b-96dd-01c1321826b1

Telemetry Enabled:
True

DPI Scale:
150%

Supported Services:
Power BI

Has anyone seen this issue before or know what the reason for it may be? Do I need to start all over again or is there a way to save my work?

Please advise. Thank you.