Windows Event Viewer:
Application: ArcGISPro.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
at ArcGIS.Desktop.Internal.Framework.IPortalManagerService.IsPortal(System.String)
at ArcGIS.Desktop.Internal.Core.SignOn+<>c__DisplayClass6d.<IsPortal>b__6c()
at System.Threading.Tasks.Task`1[[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].InnerInvoke()
at System.Threading.Tasks.Task.Execute()
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef)
at System.Threading.Tasks.Task.ExecuteEntry(Boolean)
at System.Threading.Tasks.ThreadPoolTaskScheduler.TryExecuteTaskInline(System.Threading.Tasks.Task, Boolean)
at System.Threading.Tasks.TaskScheduler.TryRunInline(System.Threading.Tasks.Task, Boolean)
at System.Threading.Tasks.Task.WrappedTryRunInline()
at System.Threading.Tasks.Task.InternalWait(Int32, System.Threading.CancellationToken)
at System.Threading.Tasks.Task`1[[System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResultCore(Boolean)
at ArcGIS.Desktop.Internal.Core.LicenseManager+<>c__DisplayClass1.<GetLicensingPortalSource>b__0()
at System.Threading.Tasks.Task`1[[ArcGIS.Desktop.Internal.Core.LicenseManager+PortalSource, ArcGIS.Desktop.Core, Version=11.3.0.0, Culture=neutral, PublicKeyToken=null]].InnerInvoke()
at System.Threading.Tasks.Task.Execute()
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef)
at System.Threading.Tasks.Task.ExecuteEntry(Boolean)
at System.Threading.ThreadPoolWorkQueue.Dispatch()