I got a following error when I try to run or analyze the workflow of both practice and solution (error message from ‘practice’):

[YM-Syscom]

I got a following error when I try to run or analyze the workflow of both practice and solution (error message from ‘practice’):

I believe this comes from my environment. Can anyone help me? I tried updating packages, but it didn’t help. My StudioX works completely fine when I create a robot from blank project.

20.3.0-beta.84+Branch.release-v20.3.0.Sha.7fc79beda33f6ae9c6f407946cf052a16a3d7a0e

Save all documents failed.

Unable to start execution: Save all documents failed.
WorkflowDocument : **\Repair my Robot - StudioX Project\Main.xaml => System.MissingMethodException: Method not found: ‘System.Type UiPath.Activities.Contracts.CodeAnalysis.ExpressionToken.get_ExpressionType()’.
at UiPath.Activities.System.Design.Services.BindingsProvider.IsValidExpression(FlatExpressionToken tokens)
at UiPath.Activities.System.Design.Services.BindingsProvider.GetPreviewFor(UiPathExpression expression)
at UiPath.Studio.Plugin.Workflow.Services.BusinessActivityBindingService.d__5.MoveNext()
at UiPath.Studio.Plugin.Workflow.DataManager.DataManagerViewModel.UpdateSavedValues()
at UiPath.Studio.Plugin.Workflow.DataManager.DataManagerViewModel.UpdateTree()
at UiPath.Studio.Plugin.Workflow.DataManager.DataManagerViewModel.SimpleDocumentService_ActiveDocumentChanged(Object sender, String id)
at UiPath.Studio.Plugin.Workflow.Services.SimpleDocumentService.RaiseActiveDocumentChanged(String id)
at UiPath.Studio.Plugin.Workflow.Services.Interfaces.ISimpleDocumentServiceProxy.RaiseActiveDocumentChanged(String id)
at UiPath.Studio.Plugin.Workflow.Services.Proxies.SimpleDocumentServiceProxy.ActiveDocument_StateChanged(Object sender, EventArgs e)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at UiPath.Studio.Plugin.Workflow.WorkflowDocument.set_IsDirty(Boolean value)
at UiPath.Studio.Shell.Services.DocumentService.d__34.MoveNext()
, HResult -2146233088